Percutaneous Kyphoplasty for Osteoporotic Vertebral Compression Fractures Associated with Spinal Canal Encroachment without Neurological Symptoms.

BACKGROUND Percutaneous kyphoplasty (PKP) has been widely used for osteoporotic vertebral compression fractures (OVCFs). However, whether this approach is suitable for osteoporotic vertebral fractures with spinal canal encroachment remains controversial. MATERIAL AND METHODS Of 526 patients who underwent PKP at our hospital, 40 had conditions associated with spinal canal encroachment, and were enrolled in the study. Detailed physical, neurological, and radiological examinations were performed on each patient before and after surgery and at the followup. A visual analog scale (VAS) and the Oswestry Disability Index (ODI) were used for the clinical assessment. The vertebral body height, the local kyphosis, and the spinal canal width were used for the radiological evaluation. RESULTS There were 11 male and 29 female patients, with a mean age of 71±8 years. The VAS score decreased from 6.4±0.7 preoperatively to 1.6±0.7 postoperatively and to 2.3±1.5 at the last followup visit. The ODI score was 78±9.5 before surgery, declined to 24±11.3 after surgery, and was 27.6±12.5 at the last followup visit. The vertebral body height increased from 11.7±4.3 mm to 14.6±4.4 mm. The local kyphosis decreased from 15.0±10.7 degrees preoperatively to 8.5±11.3 degrees postoperatively. The spinal canal width remained stable, at 8.5±2.0 mm before PKP and 8.7±1.9 after PKP. CONCLUSIONS PKP effectively relieved back pain in OVCF patients with spinal canal encroachment. Their social function improved as well.

Anatomical Study of the Descending Genicular Artery Chimeric Flaps.

Purpose: With increasing use of the chimeric flap of the descending genicular artery, the authors systematically investigated the anatomy of its branches in cadavers. Methods: Fifteen fresh cadaveric thighs were studied by anatomical dissection. The branches of the descending genicular arteries were skeletonized along their courses to the femoral arteries. Branches' lengths and diameters were measured to simulate the combined application of the skin, muscle, bone, osteochondral and osteocutaneous flaps with tendon enthesis. Results: The descending genicular artery was noted in 11 thighs, with an average diameter of 1.94 ± 0.36 mm and an average length of 10.69 ± 4.41 mm. In addition, the saphenous artery was noted in all 15 thighs, and the average diameter of the original part was 1.35 ± 0.18 mm. Branches arose from the saphenous artery to supply the skin above the knee, the anterior of tibia, the sartorius muscle and the pes anserinus. The average diameter of the osteoarticular artery was 1.80 ± 0.46 mm which divaricated into a periosteal branch to supply the bone above the medial femoral epicondyle and a few articular branches to supply the bone and the cartilage of the medial femoral condyle. Conclusions: This study systematically investigated the anatomy of the descending genicular artery and its branches. Based on the anatomical features of descending genicular artery, chimeric flap offers combination therapy with other tissue flaps. Besides, considering its long chimeric arm, chimeric flap could be used to repair not only local complex injuries but also defects in different locations. Clinical Relevance: The descending genicular artery chimeric flap is a clinical option for reconstructing compound tissue defects of limbs.

Clinical Anatomy and Possible Clinical Significance of the Postcentral Branches of Spinal Arteries in the L1-L5 Levels.

STUDY DESIGN: This was a dissection-based study of 10 embalmed human cadavers. OBJECTIVE: The objective of this study was to identify and describe the postcentral branches in the L1-L5 intervertebral foramina (IVF) and to determine their possible clinical significance. SUMMARY OF BACKGROUND DATA: The lower lumbar segmental arteries have been well studied. However, there are few articles with regard to the postcentral branches in the L1-L5 IVF. MATERIALS AND METHODS: Eighty L1-L5 IVF from 10 embalmed cadavers were studied with a surgical microscope, and the postcentral branches were identified. The branches, origin, insertion, and spatial orientation of the postcentral branches in the L1-L5 IVF were examined. The diameter of the arteries was measured using a Vernier caliper. RESULTS: In our study, the occurrence rate of a postcentral branch was 100.00% in the 80 IVFs. The postcentral branch was routinely divided into the following 2 types: type 1, postcentral branch main trunks (65.00%), which branch from the spinal arteries or lumbar arteries and then divide into 2 branches (superior and inferior branches), and type 2, superior and inferior branches, which branch straight from the spinal arteries (35.00%). The initial portion of the postcentral branches traveled around the anterolateral edge of the disk to the dorsum. CONCLUSIONS: Postcentral branches of spinal arteries are common structures in IVF; there are 2 types of postcentral branches. Thorough understanding of the spinal arteries before percutaneous endoscopic lumbar discectomy may be an important step in reducing intraoperative bleeding and ensuring clear visualization, which may result in significant benefits for patients.

Clinical Anatomy and Possible Clinical Significance of the Intervertebral Vein in the Lumbar Intervertebral Foramina.

BACKGROUND: The detailed structure of the lumbar intervertebral foramina has been well-studied. Nevertheless, detailed descriptions of branches of the intervertebral vein (IV) through the lumbar intervertebral foramina are lacking. OBJECTIVES: This study aimed to provide an anatomical basis for invasive treatment targeting the branches of the IV using an approach through the lumbar intervertebral foramina, particularly for the purposes of transforaminal epidural steroid injection. STUDY DESIGN: This research involved a dissection-based study of 10 embalmed human cadavers. SETTING: The research took place at The Third Affiliated Hospital of Southern Medical University. METHODS: One hundred lumbar intervertebral foramina from 10 embalmed cadavers were studied. Branches of the IV in the intervertebral foramina were observed. The length and diameter of the veins were measured using a Vernier caliper. RESULTS: At a rate of 100%, branches of the IV were observed in the 100 lumbar foramina examined in our study. The following 4 types of branches of the IV were routinely found: Type I in 27 (27%) of the IV foramina, in which a superior branch of the IV ran along the inferior margin of the vertebral pedicle; Type II in 18 (18%) of the intervertebral foramina, in which an inferior branch of the IV ran along the superior margin of the inferior vertebral pedicle; Type III in 41 (41%) of the intervertebral foramina, in which the IV was divided into a superior and inferior branch; and Type IV in 14 (14%) of the intervertebral foramina, in which the IV was divided into 2 superior branches and an inferior branch. LIMITATIONS: The greatest weakness of this study is that it lacks actual clinical verification. Future clinical trials are expected to contribute more objective data concerning the IV branches. Due to the relative changes in vascular position during dissection, the relevant data warrant improvement. CONCLUSIONS: The lumbar IVs are an important part of the anatomical structure of the intervertebral foramina. Adequate knowledge of the IV may be of clinical importance to physicians performing transforaminal epidural steroid injection. KEY WORDS: Clinical anatomy, intervertebral veins, lumbar vertebra, Kambin's triangle, safe triangle, intervertebral foramina, vertebral venous system, inadvertent injection, transforaminal epidural steroid injection.

Optimal axis for lumbosacral interbody fusion: Prospective finite element analysis and retrospective 3D-CT measurement.

A feasible and optimal axis of biomechanical and anatomic significance in axial lumbosacral interbody fusion (AxiaLIF) was designed. Using the image dataset of an adult volunteer, two groups of finite element (FE) models of the AxiaLIF, lumbosacral anterior column fixation (ACF) models and middle column fixation (MCF) models with different bone graft fusion degrees, were prospectively established, and their biomechanical differences were comparatively predicted. In addition, 3D reconstruction was performed by retrospectively collecting CT data from pelvises in 60 adult cases. Their anatomic parameters relating to two groups of models were digitally measured and statistically compared. Numerical analysis revealed that the load and the maximum stress on the screw as well as the maximum stress difference between the screw and peripheral tissues in the MCF model were reduced compared with the ACF model. These indices of both models all decreased markedly in response to the increase in the disc fusion degree. Statistical analysis revealed that the effective fixed length of the sacrum in the MCF model was increased compared with the ACF model (P < 0.05). The surgical dissection distance of presacral vessels and nerves from the axis to sacrum of the MCF model was reduced compared with the ACF model (P < 0.05). The feasible and optimal axis of biomechanical and anatomic significance of the AxiaLIF is similar to the axis of the MCF model. Disc bone graft fusions plus axial screw fixations of middle column could strengthen the biomechanical stability of the AxiaLIF model. Clin. Anat. 32:337-347, 2019. © 2018 Wiley Periodicals, Inc.

The Morphology and Clinical Significance of the Extraforaminal Ligaments at the T1-T12 Levels.

STUDY DESIGN: A dissection-based study of 10 embalmed human cadavers. OBJECTIVE: The purpose of this study was to describe the extraforaminal ligaments in the exit regions of the T1-T12 intervertebral foramina and to discuss their possible clinical significance. SUMMARY OF BACKGROUND DATA: The ligaments at the lumbar intervertebral foramina have been well studied. However, detailed descriptions of the extraforaminal ligaments at the T1-T12 levels are lacking. METHODS: Two hundred forty T1-T12 intervertebral foramina from 10 embalmed cadavers were studied. The presence of the ligament was noted. The quantity, morphology, distributions, proximal attachments, distal attachments, and spatial orientations of the extraforaminal ligaments in the exit regions of the T1-T12 intervertebral foramina were examined. The length, width, diameter, and thickness of the ligaments were measured with digital calipers by three independent investigators. RESULTS: A total of 564 extraforaminal ligaments were identified in the 229 intervertebral foramina; no ligaments were found in the other 11 intervertebral foramina, resulting in an occurrence rate of extraforaminal ligaments of 95.42%. One hundred thirty-six (24.11%) of the extraforaminal ligaments were radiating ligaments, and 428 (75.89%) were transforaminal ligaments. Radiating ligaments had a tendency to be abundant at T1 and T9-T12 and sparse at T2-T8. There were 245 (43.44%) ligaments at the anterior aspect of the exit regions of the intervertebral foramina, 225 (39.89%) ligaments at the posterior aspect, 64 (11.35%) ligaments at the inferior aspect, and 30 (5.32%) ligaments at the superior aspect. CONCLUSION: In the exit region of thoracic intervertebral foramina, there are two types of extraforaminal ligaments. They may serve as a protective mechanism against traction and play a role in the positioning of the nerves in the intervertebral foramen. Transforaminal ligaments may be an underlying cause of rib or chest pain after thoracic fracture and may be of clinical importance to surgeons. LEVEL OF EVIDENCE: N/A.

The Morphology and Possible Clinical Significance of the Intraforaminal Ligaments in the Entrance Zones of the L1-L5 Levels.

BACKGROUND: The extraforaminal ligaments between the L1-L5 lumbar spinal nerves and the tissues surrounding the intervertebral foramina (IVF) have been well studied. However, little research has been performed to describe the local anatomy of the entrance zones at the L1-L5 level. Detailed anatomic studies of the intraforaminal ligaments (IFLs) in the entrance zones at the L1-L5 levels have not been performed. OBJECTIVES: The objective of this study is to identify and describe the IFLs in the entrance zones of the L1-L5 IVF and to determine their possible clinical significance. STUDY DESIGN: A dissection-based study of 10 fresh-frozen human cadavers. SETTING: Guangdong Provincial Key Laboratory of Medical Biomechanics in Anatomy Department of Southern Medical University. METHODS: Eighty L1-L5 IVF from 10 fresh cadavers were studied, and the IFLs in the entrance zones were identified. The quantities, morphologies, origins, insertions, and spatial orientations of the IFLs in the entrance zones of the L1-L5 IVF were observed. The lengths, widths, diameters, and thicknesses of the ligaments were measured using a vernier caliper. Ten intraforaminal radiating ligaments were removed for histological examination. RESULTS: A total of 197 ligaments were identified in the entrance zones of the 80 L1-L5 IVF, including 191 (96.95%) radiating ligaments and 6 (3.05%) transforaminal ligaments. The thickest ligaments were observed at the L3-L4 IVF. The lengths of the ligaments varied from 0.59 to 11.92 mm. There were 66 (33.50%) ligaments in the superior aspect of the entrance zone of the IVF, 58 (29.44%) ligaments at the anterior aspect, 43 (21.83%) ligaments at the posterior aspect, and 30 (15.23%) ligaments at the inferior aspect. The morphologies of the IFLs were divided into 2 types: the strap type and the trabs type. Histological examination of the meningovertebral ligaments revealed fibrous connective tissue. LIMITATIONS: The major limitation of this study is the lack of actual clinical data from live patients. In addition, future medical biomechanics experiments are expected to contribute more objective data on the strength of the IFLs. CONCLUSIONS: In the lumbar spine, IFLs are common structures in the entrance zones of the L1-L5 IVF, and radiating ligaments are more likely to be present. KEY WORDS: Clinical Anatomy, microdissection, intraforaminal ligament, the entrance zone, L1-L5 intervertebral foramen, endoscopic spinal adhesiolysis, sacral hiatus, cerebrospinal fluid leakage, dural laceration.

Comparison of laparoscopic vs. open surgery for rectal cancer.

This study was conducted to evaluate the safety of laparoscopic radical resection for rectal cancer. A total of 64 cases of rectal cancer patients undergoing radical surgery between January, 1998 and March, 2010 were collected. The patients were divided into the laparoscopic rectal surgery group (LS group, n=31) and the open surgery group (OS group, n=33). Operation time, postoperative recovery, complications and tumor-free survival rate were compared between the two groups. The inclusion criteria were as follows: Standard Karnofsky score >70 prior to surgery, definitive pathological diagnosis and complete clinical data. The exclusion criteria were concomitant tumors affecting survival. With the Dixon operation, the LS group had a longer operation time compared with the OS group (271.2±56.2 vs. 216.0±62.7 min, respectively; P=0.036), and an earlier time of oral intake (3.0±0.9 vs. 4.7±1.0 days, respectively; P=0.000). There were no significant differences between the LS and OS groups in terms of intraoperative blood loss, number of lymph nodes retrieved, duration of postoperative hyperthermia and hospitalization time (P>0.05). With the Miles operation, there were no obvious differences between the LS and OS groups regarding operation time, intraoperative blood loss, number of lymph nodes retrieved, time of oral intake, duration of postoperative hyperthermia and hospitalization time (P>0.05). Furthermore, there were no significant differences between the LS and OS groups with the Dixon or Miles operation in terms of 3-year tumor-free survival rate (P>0.05). Thus, laparoscopic surgery appears to be a safe and feasible option for the treatment of rectal cancer.

Morphology and Possible Clinical Significance of the Radiating Extraforaminal Ligaments at the L1-L5 Levels.

STUDY DESIGN: A dissection-based study of 10 fresh-frozen human cadavers. OBJECTIVE: The objective of this study was to identify and describe the radiating extraforaminal ligaments in the exit regions of the L1-L5 intervertebral foramina and to research their possible clinical significance. SUMMARY OF BACKGROUND DATA: The transforaminal ligaments at the L1-L5 intervertebral foramina have been well studied. However, detailed descriptions of the radiating extraforaminal ligaments at L1-L5 are lacking. METHODS: Eighty L1-L5 intervertebral foramina from 10 fresh cadavers were studied, and the extraforaminal ligaments were identified. The quantity, morphology, origin, insertion, and spatial orientation of the extraforaminal ligaments in the L1-L5 regions were examined. The length, width, diameter, and thickness of the ligaments were measured using a vernier caliper. RESULTS: A total of 224 extraforaminal ligaments were identified in the 80 L1-L5 intervertebral foramina, and the occurrence rate of extraforaminal ligaments was 100%. One hundred and eighteen (52.68%) of the extraforaminal ligaments were radiating ligaments, and 106 (47.32%) of the extraforaminal ligaments were transforaminal ligaments. There were 97 (43.30%) ligaments at the superior aspect of the exit regions of the intervertebral foramina, 51 (22.77%) ligaments at the anterior aspect, 44 (19.64%) ligaments at the inferior aspect, and 32 (14.29%) ligaments at the posterior aspect. The morphologies of the extraforaminal ligaments were divided into two types: the strap type and the trabs type. CONCLUSION: Radiating extraforaminal ligaments exist between spinal nerves and nearby structures. Radiating extraforaminal ligaments may be of clinical importance to surgeons. Dissecting the radiating extraforaminal ligaments before percutaneous endoscopic lumbar discectomy may be an important step in reducing postoperative pain, which may result in significant benefits for patients. LEVEL OF EVIDENCE: 3.

A controlled study on the anatomy of cervical extraforaminal ligaments and three-dimensional fast-imaging employing a steady-state acquisition sequence.

PURPOSE: To evaluate the utility of magnetic resonance three-dimensional fast-imaging employing a steady-state acquisition (MR 3D-FIESTA) sequence to study cervical EFLs using the anatomical results of cadavers as the gold standard. METHODS: Part I: The cervical regions of five embalmed adult cadavers were scanned using the MR 3D-FIESTA sequence. Ligamentous structures in the intervertebral foramina (IVFs) between C4 and T1 in the MRI scans were identified by a radiologist. Part II: After the specimens were scanned, gross and microscopic anatomical studies were conducted on the IVFs between C4 and T1 in the specimens by an anatomist. Part III: Using the anatomical results of the cadavers as the gold standard, the utility of the MR 3D-FIESTA sequence for imaging cervical EFLs was evaluated. Specificity, sensitivity, positive and negative predictive values (PPV and NPV, respectively) and accuracy were calculated. RESULTS: The occurrence rate of transforaminal ligaments (TFLs) in the IVFs between C4 and T1 was 42.5%. The results obtained by the radiologist using the MR 3D-FIESTA sequence to identify TFLs are as follows: specificity 96.2%, sensitivity 76.5%, PPV 92.9%, NPV 86.2%, and accuracy 88.4%. CONCLUSION: MR 3D-FIESTA sequences clearly showed cervical EFLs. In the 3D-FIESTA sequence scans that the radiologist believed to indicate the presence of a cervical TFL, the probability that the TFL existed was approximately 93%. When the radiologist believed that no TFL was present in the 3D-FIESTA sequence scan, the probability that a TFL existed was 14%.

Comparison of the Effects of Epidural Anesthesia and Local Anesthesia in Lumbar Transforaminal Endoscopic Surgery.

BACKGROUND: Percutaneous endoscopic lumbar discectomy (PELD) is a standard technique for the treatment of lumbar disc hernia. Thus far, most surgeons have recommended local anesthesia. However, in clinical practice, some patients experience pain and are unable to cooperate with the surgery during intervertebral foramen hemp expansion. The use of general anesthesia may create a greater risk of complications because of nerve root anomalies; thus, intraoperative neurophysiological monitoring should be utilized. Reports regarding the use of epidural anesthesia are few in comparison. OBJECTIVE: To investigate the risks and contingency plans of epidural anesthesia in lumbar transforaminal endoscopic surgery. STUDY DESIGN: A retrospective analysis of all lumbar transforaminal endoscopic surgeries performed from 2010 to 2014. SETTING: Kanghua hospital. METHODS: Patients treated with local and epidural anesthesia were divided into 2 groups. In local anesthesia group (A) and local anesthesia group (B), 0.5% lidocaine and 0.25% ropivacaine was administered, respectively. The incidences of complications, including urological complications, in each surgical group as well as Oswestry disability idex (ODI) improvement rates, postoperative patient satisfaction rates, and x-ray exposure times were assessed.

BACKGROUND: There are many different reasons why patients could be experiencing pain in the gluteal area. Previous studies have shown an association between radicular low back pain (LBP) and gluteal pain (GP). Studies locating the specific level responsible for gluteal pain in lumbar disc hernias have rarely been reported. METHODS: All patients with lumbar disc herniation (LDH) in the Kanghua hospital from 2010 to 2014 were recruited. All patients underwent a lumbar spine MRI to clarify their LDH diagnosis, and patients were allocated to a GP group and a non-GP group. To determine the cause and effect relationship between LDH and GP, all of the patients were subjected to percutaneous endoscopic lumbar discectomy (PELD). RESULTS: A total of 286 cases were included according to the inclusive criteria, with 168 cases in the GP group and 118 cases in the non-GP group. Of these, in the GP group, 159 cases involved the L4/5 level and 9 cases involved the L5/S1 level, while in the non-GP group, 43 cases involved the L4/5 level and 48 cases involved the L5/S1 level. PELD was performed in both groups. Gluteal pain gradually disappeared after surgery in all of the patients. Gluteal pain recrudesced in a patient with recurrent disc herniation (L4/5). CONCLUSIONS: As a clinical finding, gluteal pain is related to low lumbar disc hernia. The L4/5 level is the main level responsible for gluteal pain in lumbar disc hernia. No patients with gluteal pain exhibited involvement at the L3/4 level.

BACKGROUND CONTEXT: The extraforaminal ligaments between the L5 and S1 lumbar spinal nerves and the tissues surrounding the intervertebral foramina have been well studied. However, little research has been undertaken to describe the local anatomy of the intraforaminal portion of the L5-S1 spine and detailed anatomical studies of the intraforaminal ligaments (IFLs) of the L5-S1 have not been performed. PURPOSE: The objective of this study was to identify and describe the IFLs in relation to the L5-S1 intervertebral foramen (IVF) and to determine their clinical significance. STUDY DESIGN: A dissection-based study of five embalmed and five fresh-frozen human cadavers was carried out. METHODS: Twenty L5-S1 intervertebral foramina from five embalmed cadavers and five fresh cadavers were studied, and the IFLs were identified. The quantity, morphology, origin, insertion, and spatial orientation of the IFLs in the L5-S1 region were observed. The length, width, diameter, and thickness of the ligaments were measured with a vernier caliper. This study has been supported by grants from the National Natural Science Foundation of China (Grant No. 31271286) without potential conflict of interest-associated biases in the text of the paper. RESULTS: The IFLs could be found from the entrance zone (inside) to the exit zone (outside) of the L5-S1 IVF. These ligaments were found to be of two types: a radiating ligament, which connected the nerve root sleeves that radiated to the transverse processes and wall of the IVF, and a transforaminal ligament, which connected the structures around the IVF. In our study, the radiating ligaments were found more often than the transforaminal ligaments. CONCLUSIONS: The results demonstrate that IFLs are common structures in the IVF and that there are two types of IFLs: the transforaminal ligaments and the radiating ligaments. Transforaminal ligaments may be the potential cause of back pain. The radiating ligaments may contribute to dura laceration and epidural hemorrhage during endoscopic spinal adhesiolysis through the sacral hiatus, and an appreciation of this relationship might help reduce the risk of such complications.

BACKGROUND: The retrolabyrinthine and transcrusal approaches (RLA and TCA, respectively) are the two most often used posterior transpetrosal approaches that are used to treat lesions in the retrochiasmatic region. Endoscopes are increasingly used in neurosurgical practice. To determine whether a difference exists between the two transpetrosal approaches in the retrochiasmatic region, we evaluated and compared the exposure and maneuverability associated with the microscope and the endoscope in these approaches. METHODS: Seven formalin-fixed cadaveric heads were dissected bilaterally through the two approaches: four for evaluation and three injected with colored latex for photography. The retrochiasmatic region was divided into four sub-compartments: the compartment before the infundibulum, which was further divided into two parts, (1) the ipsilateral and (2) the contralateral compartments; (3) the retroinfundibulum compartment; (4) the third ventricle. After each approach, exposure and maneuverability of the structures in these four compartments obtained by microscopy and endoscopy were scored under a guidance of a numerical grading system for further comparison. RESULTS: The TCA provided better exposure and maneuverability at the retrochiasmatic region than the RLA in both the microscopy model [scores of 39.75 ± 2.12 and 32.38 ± 2.56 respectively (p < 0.05)] and the endoscopy model [scores of 82.13 ± 3.40 and 43.75 ± 1.67 respectively (p < 0.05)]. CONCLUSIONS: The TCA is better than the RLA at offering exposure and manipulation to structures in the retrochiasmatic region, especially in patients whose lesion is located high into the third ventricle and/or expanded into the contralateral part. Endoscopes may be helpful in TCA in terms of exposing and maneuvering structures in the contralateral and interpeduncle fossa areas. However, in RLA, not enough room is available for simultaneously maneuvering an endoscope and a surgical instrument.

BACKGROUND: Most of the frequently used methods for finger reconstruction have their own limitations. Reconstruction of a full-length finger with normal appearance, in patients with proximal digital amputation, remains a challenge. METHODS: Between January 2002 and November 2013, a total of 86 fingers (60 patients) with proximal phalanx amputation were surgically repaired. A compound flap comprising an expanded wraparound flap from the great toe and a vascularized proximal interphalangeal (PIP) joint from the second toe was harvested to reconstruct a full-length finger. The flap was used to reconstruct the nail, skin, and the distal phalanx; the PIP joint was used to reconstruct the PIP joint. To attain normal length of the finger and right PIP joint positioning, an iliac bone graft was inserted into the distal-middle or proximal phalanx. RESULTS: All reconstructed fingers retained their viability and natural appearance and were of near-normal length with a normal PIP joint positioning; 12.8% (9/86) of the procedures required re-exploration owing to compromised circulation. Secondary procedures were required in 71% (61/86) of the cases. With the exception of 1 case, the donor-site complications were mild; the average range of motion at the other PIP joints was 52 degrees (-15 to -5 degrees of extension, 25-90 degrees of flexion). Approximately 80% of the normal functionality and 93% of the normal appearance with respect to aesthetics were restored. CONCLUSIONS: The full-length finger reconstruction procedure allows for construction of natural-appearing full-length fingers with normal PIP joint positioning and a near-normal functional recovery for proximal digital amputation. The operation is technically complex and time consuming and demands a skilled operator for successful outcomes.

BACKGROUND CONTEXT: Previous studies have shown an association between the degree of cervical degenerative spondylolisthesis (DS) and spinal cord conditions of the cervical spine. However, there is no information available on the association between the severity of cervical DS and the orientation of the cervical facet joints. This study examined the association between the severity of cervical DS and facet tropism. PURPOSE: This study aimed to retrospectively explore the relationship between facet tropism and cervical DS and the effect of facet tropism on cervical DS. STUDY DESIGN: A retrospective review of radiographic and magnetic resonance imaging (MRI) findings in patients with or without cervical DS was carried out. PATIENT SAMPLE: A total of 200 patients from a single institution who underwent both MRI and radiography were reviewed. OUTCOME MEASURES: The facet angles at the C3-C4, C4-C5, and C5-C6 levels based on axial MRI in the two groups and the slippage degree at C4-C5 based on neutral lateral radiographs in the experimental group were measured and calculated. METHODS: One hundred patients with only C4-C5 level cervical DS who were treated in our hospital from January 2005 to August 2011 were selected as the experimental group. One hundred age- and sex-matched spinal disease-free patients were selected as the control group from patients who presented for physical examinations. Comparative analysis of the obtained parameters was performed to determine significant differences between the examined levels in the two groups and to investigate the association between cervical DS and facet tropism. RESULTS: Facet tropism at C4-C5 was significantly greater than that at C3-C4 and C5-C6 in the experimental group (C4-C5 vs. C3-C4, p<.001; C4-C5 vs. C5-C6, p<.001), but there were no significant differences between the examined levels in the control group (p=.075). Facet tropism at C4-C5 in the moderate spondylolisthesis patients was significantly greater than that in the severe spondylolisthesis patients (p=.036), but facet tropism severity did not vary with the degree of spondylolisthesis in the experimental group (p=.108). CONCLUSIONS: This study revealed that facet tropism is universally present at the C3-C4, C4-C5, and C5-C6 levels and that the greatest degree of facet tropism exists in spondylolisthesis-affected levels. Although there was no significant correlation between facet tropism severity and the degree of spondylolisthesis, facet tropism was found to increase the risk of the development of spondylolisthesis. This finding suggested that facet tropism may play a significant role in cervical DS.

INTRODUCTION: Migratory cells via blood circulation or cells adjacent to the root apex may potentially participate in dental pulp tissue regeneration or renewal. This study investigated whether systemically transplanted bone marrow cells can contribute to pulp regeneration in a chimeric mouse model. METHODS: A chimeric mouse model was created through the injection of bone marrow cells from green fluorescent protein (GFP) transgenic C57BL/6 mice into the tail veins of recipient wild-type C57BL/6 mice that had been irradiated with a lethal dose of 8.5 Gy from a high-frequency linear accelerator. These mice were subjected to pulpectomy and pulp revascularization. At 1, 4, and 8 weeks after surgery, in vivo animal imaging and histologic analyses were conducted. RESULTS: In vivo animal imaging showed that the green biofluorescence signal from the transplanted GFP+ cells increased significantly and was maintained at a high level during the first 4 weeks after surgery. Immunofluorescence analyses of tooth specimens collected at 8 weeks postsurgery showed the presence of nestin+/GFP+, α smooth muscle actin (α-SMA)/GFP+, and NeuN/GFP+ cells within the regenerated pulplike tissue. CONCLUSIONS: These data confirm that transplanted bone marrow-derived cells can contribute to dental pulp regeneration.

Small bowel tumors are rare tumors. Duodenal tumors occur more commonly compared with other small intestinal tumors. To summarize the clinicopathological features of duodenal tumors, in the present study 44 cases of duodenal tumors were collected, and the comparative clinicopathological characteristics between tumors of the ampulla and non-ampulla, the choice of treatment, and differences in the prognosis, were analyzed. The pathological type identified was predominantly adenocarcinoma; periampullary duodenal tumors were almost classifiable as adenocarcinoma in terms of their type. Non-ampulla duodenal tumors also included rare pathological types, such as stromal tumor and large B-cell lymphoma. The symptoms of duodenal tumors were non-specific, therefore rendering early diagnosis and treatment difficult. Due to jaundice, periampullary duodenal tumors were diagnosed earlier than non-ampulla duodenal tumors. Endoscopy and computed tomography (CT) examinations were valuable in terms of diagnosis, and were used as a means of screening. Carcinoembryonic antigen (CEA) and cancer antigen 199 (CA199) were revealed to be important as biomarkers. Radical surgery was the most effective treatment. Pancreaticoduodenectomy was revealed to be applicable in all cases of duodenal tumors. For non-ampulla duodenal tumors, partial duodenum resection and subtotal gastrectomy were appropriate for selection as methods of treatment. No survival benefits were identified for adjuvant chemotherapy. Duodenal tumors were shown to be a rare neoplasm with atypical symptoms; they should be diagnosed and treated as early as possible; CT and gastroscopy may be used for screening, radical surgery offers the best treatment; pancreatoduodenectomy is not the only surgery option available; and chemotherapy did not result in any survival benefits.

INTRODUCTION: Composite injuries of the volar surfaces of fingers are frequently associated with digital vessel and nerve damage. Flow-through glabrous flaps can provide esthetic tissue coverage as well as revascularization, and using a neurovascular flap, allows primary reconstruction of the digital nerve. METHODS: Between June 2010 and August 2014, we prospectively studied the use of Microsurgical flow-through glabrous flaps to achieve simultaneously digital revascularization and soft tissue coverage in 13 fingers of 12 patients who experienced volar injuries, comprising 6 great toe fibular flaps, 3 medial plantar flaps, 1 pedis medialis flap, and 3 hypothenar flaps. The nerve passing through the great toe fibular flap or medial plantar flap was used to repair digital nerve defects. RESULTS: All flaps survived completely. During a mean follow-up period of 13.6 months, the majority recovered excellent appearance and function. The flaps had the characteristics of normal finger volar skin: hairless, with similar texture and color. The mean static 2-point discrimination and Semmes-Weinstein monofilament scores of finger pulp were 4.8 and 3.03 mmin the great toe fibular flap group, 7.3 and 3.89 mm in the medial plantar flap group, and 7.5 and 3.84 mm in the sural nerve group. CONCLUSIONS: Glabrous flow-through flaps provide excellent reconstruction for fingers with volar injuries associated with digital vessel damage. The great toe fibular flap and the medial plantar flap are reliable and useful options for complicated finger injuries associated with digital vessel and nerve injuries.

Differentiated thyroid carcinoma (DTC) is one of the most common metabolic disorders and accounts for 98% of all cases of thyroid cancer. Previously, a number of studies have investigated the prognostic factors associated with well-differentiated thyroid carcinoma (WDTC); however, these studies yielded conflicting results. The current study used a retrospective study design to collect data from WDTC patients who had received the same treatment regimen from the same institute, with a minimum follow-up of 10 years. The De Groot staging system was used to classify WDTC in a total of 320 patients (240 females and 80 males). Among the subjects, the pathological subtypes identified were as follows: Papillary carcinoma (240 cases, 75%), follicular carcinoma (67 cases, 21%) and Hürthle cell carcinoma (13 cases, 4%). Prognostic factors that significantly affected the clinical outcome of the disease were advanced age (P=0.001), tumor size (P=0.03), presence of thyroglobulin (P=0.001) and De Groot stage (P=0.005). The 10-year follow-up study revealed that WDTC is associated with a high survival rate of 96% (307/320 patients survived) and a low mortality rate (4%).

Which level is responsible for gluteal pain in lumbar disc hernia?

BACKGROUND: There are many different reasons why patients could be experiencing pain in the gluteal area. Previous studies have shown an association between radicular low back pain (LBP) and gluteal pain (GP). Studies locating the specific level responsible for gluteal pain in lumbar disc hernias have rarely been reported. METHODS: All patients with lumbar disc herniation (LDH) in the Kanghua hospital from 2010 to 2014 were recruited. All patients underwent a lumbar spine MRI to clarify their LDH diagnosis, and patients were allocated to a GP group and a non-GP group. To determine the cause and effect relationship between LDH and GP, all of the patients were subjected to percutaneous endoscopic lumbar discectomy (PELD). RESULTS: A total of 286 cases were included according to the inclusive criteria, with 168 cases in the GP group and 118 cases in the non-GP group. Of these, in the GP group, 159 cases involved the L4/5 level and 9 cases involved the L5/S1 level, while in the non-GP group, 43 cases involved the L4/5 level and 48 cases involved the L5/S1 level. PELD was performed in both groups. Gluteal pain gradually disappeared after surgery in all of the patients. Gluteal pain recrudesced in a patient with recurrent disc herniation (L4/5). CONCLUSIONS: As a clinical finding, gluteal pain is related to low lumbar disc hernia. The L4/5 level is the main level responsible for gluteal pain in lumbar disc hernia. No patients with gluteal pain exhibited involvement at the L3/4 level.

The morphology and clinical significance of the intraforaminal ligaments at the L5-S1 levels.

BACKGROUND CONTEXT: The extraforaminal ligaments between the L5 and S1 lumbar spinal nerves and the tissues surrounding the intervertebral foramina have been well studied. However, little research has been undertaken to describe the local anatomy of the intraforaminal portion of the L5-S1 spine and detailed anatomical studies of the intraforaminal ligaments (IFLs) of the L5-S1 have not been performed. PURPOSE: The objective of this study was to identify and describe the IFLs in relation to the L5-S1 intervertebral foramen (IVF) and to determine their clinical significance. STUDY DESIGN: A dissection-based study of five embalmed and five fresh-frozen human cadavers was carried out. METHODS: Twenty L5-S1 intervertebral foramina from five embalmed cadavers and five fresh cadavers were studied, and the IFLs were identified. The quantity, morphology, origin, insertion, and spatial orientation of the IFLs in the L5-S1 region were observed. The length, width, diameter, and thickness of the ligaments were measured with a vernier caliper. This study has been supported by grants from the National Natural Science Foundation of China (Grant No. 31271286) without potential conflict of interest-associated biases in the text of the paper. RESULTS: The IFLs could be found from the entrance zone (inside) to the exit zone (outside) of the L5-S1 IVF. These ligaments were found to be of two types: a radiating ligament, which connected the nerve root sleeves that radiated to the transverse processes and wall of the IVF, and a transforaminal ligament, which connected the structures around the IVF. In our study, the radiating ligaments were found more often than the transforaminal ligaments. CONCLUSIONS: The results demonstrate that IFLs are common structures in the IVF and that there are two types of IFLs: the transforaminal ligaments and the radiating ligaments. Transforaminal ligaments may be the potential cause of back pain. The radiating ligaments may contribute to dura laceration and epidural hemorrhage during endoscopic spinal adhesiolysis through the sacral hiatus, and an appreciation of this relationship might help reduce the risk of such complications.

Comparison of surgical exposure and maneuverability associated with microscopy and endoscopy in the retrolabyrinthine and transcrusal approaches to the retrochiasmatic region: a cadaveric study.

BACKGROUND: The retrolabyrinthine and transcrusal approaches (RLA and TCA, respectively) are the two most often used posterior transpetrosal approaches that are used to treat lesions in the retrochiasmatic region. Endoscopes are increasingly used in neurosurgical practice. To determine whether a difference exists between the two transpetrosal approaches in the retrochiasmatic region, we evaluated and compared the exposure and maneuverability associated with the microscope and the endoscope in these approaches. METHODS: Seven formalin-fixed cadaveric heads were dissected bilaterally through the two approaches: four for evaluation and three injected with colored latex for photography. The retrochiasmatic region was divided into four sub-compartments: the compartment before the infundibulum, which was further divided into two parts, (1) the ipsilateral and (2) the contralateral compartments; (3) the retroinfundibulum compartment; (4) the third ventricle. After each approach, exposure and maneuverability of the structures in these four compartments obtained by microscopy and endoscopy were scored under a guidance of a numerical grading system for further comparison. RESULTS: The TCA provided better exposure and maneuverability at the retrochiasmatic region than the RLA in both the microscopy model [scores of 39.75 ± 2.12 and 32.38 ± 2.56 respectively (p < 0.05)] and the endoscopy model [scores of 82.13 ± 3.40 and 43.75 ± 1.67 respectively (p < 0.05)]. CONCLUSIONS: The TCA is better than the RLA at offering exposure and manipulation to structures in the retrochiasmatic region, especially in patients whose lesion is located high into the third ventricle and/or expanded into the contralateral part. Endoscopes may be helpful in TCA in terms of exposing and maneuvering structures in the contralateral and interpeduncle fossa areas. However, in RLA, not enough room is available for simultaneously maneuvering an endoscope and a surgical instrument.

Full-Length Finger Reconstruction for Proximal Amputation With Expanded Wraparound Great Toe Flap and Vascularized Second Toe Joint.

BACKGROUND: Most of the frequently used methods for finger reconstruction have their own limitations. Reconstruction of a full-length finger with normal appearance, in patients with proximal digital amputation, remains a challenge. METHODS: Between January 2002 and November 2013, a total of 86 fingers (60 patients) with proximal phalanx amputation were surgically repaired. A compound flap comprising an expanded wraparound flap from the great toe and a vascularized proximal interphalangeal (PIP) joint from the second toe was harvested to reconstruct a full-length finger. The flap was used to reconstruct the nail, skin, and the distal phalanx; the PIP joint was used to reconstruct the PIP joint. To attain normal length of the finger and right PIP joint positioning, an iliac bone graft was inserted into the distal-middle or proximal phalanx. RESULTS: All reconstructed fingers retained their viability and natural appearance and were of near-normal length with a normal PIP joint positioning; 12.8% (9/86) of the procedures required re-exploration owing to compromised circulation. Secondary procedures were required in 71% (61/86) of the cases. With the exception of 1 case, the donor-site complications were mild; the average range of motion at the other PIP joints was 52 degrees (-15 to -5 degrees of extension, 25-90 degrees of flexion). Approximately 80% of the normal functionality and 93% of the normal appearance with respect to aesthetics were restored. CONCLUSIONS: The full-length finger reconstruction procedure allows for construction of natural-appearing full-length fingers with normal PIP joint positioning and a near-normal functional recovery for proximal digital amputation. The operation is technically complex and time consuming and demands a skilled operator for successful outcomes.

Cervical degenerative spondylolisthesis: analysis of facet orientation and the severity of cervical spondylolisthesis.

BACKGROUND CONTEXT: Previous studies have shown an association between the degree of cervical degenerative spondylolisthesis (DS) and spinal cord conditions of the cervical spine. However, there is no information available on the association between the severity of cervical DS and the orientation of the cervical facet joints. This study examined the association between the severity of cervical DS and facet tropism. PURPOSE: This study aimed to retrospectively explore the relationship between facet tropism and cervical DS and the effect of facet tropism on cervical DS. STUDY DESIGN: A retrospective review of radiographic and magnetic resonance imaging (MRI) findings in patients with or without cervical DS was carried out. PATIENT SAMPLE: A total of 200 patients from a single institution who underwent both MRI and radiography were reviewed. OUTCOME MEASURES: The facet angles at the C3-C4, C4-C5, and C5-C6 levels based on axial MRI in the two groups and the slippage degree at C4-C5 based on neutral lateral radiographs in the experimental group were measured and calculated. METHODS: One hundred patients with only C4-C5 level cervical DS who were treated in our hospital from January 2005 to August 2011 were selected as the experimental group. One hundred age- and sex-matched spinal disease-free patients were selected as the control group from patients who presented for physical examinations. Comparative analysis of the obtained parameters was performed to determine significant differences between the examined levels in the two groups and to investigate the association between cervical DS and facet tropism. RESULTS: Facet tropism at C4-C5 was significantly greater than that at C3-C4 and C5-C6 in the experimental group (C4-C5 vs. C3-C4, p<.001; C4-C5 vs. C5-C6, p<.001), but there were no significant differences between the examined levels in the control group (p=.075). Facet tropism at C4-C5 in the moderate spondylolisthesis patients was significantly greater than that in the severe spondylolisthesis patients (p=.036), but facet tropism severity did not vary with the degree of spondylolisthesis in the experimental group (p=.108). CONCLUSIONS: This study revealed that facet tropism is universally present at the C3-C4, C4-C5, and C5-C6 levels and that the greatest degree of facet tropism exists in spondylolisthesis-affected levels. Although there was no significant correlation between facet tropism severity and the degree of spondylolisthesis, facet tropism was found to increase the risk of the development of spondylolisthesis. This finding suggested that facet tropism may play a significant role in cervical DS.

Systemically Transplanted Bone Marrow-derived Cells Contribute to Dental Pulp Regeneration in a Chimeric Mouse Model.

INTRODUCTION: Migratory cells via blood circulation or cells adjacent to the root apex may potentially participate in dental pulp tissue regeneration or renewal. This study investigated whether systemically transplanted bone marrow cells can contribute to pulp regeneration in a chimeric mouse model. METHODS: A chimeric mouse model was created through the injection of bone marrow cells from green fluorescent protein (GFP) transgenic C57BL/6 mice into the tail veins of recipient wild-type C57BL/6 mice that had been irradiated with a lethal dose of 8.5 Gy from a high-frequency linear accelerator. These mice were subjected to pulpectomy and pulp revascularization. At 1, 4, and 8 weeks after surgery, in vivo animal imaging and histologic analyses were conducted. RESULTS: In vivo animal imaging showed that the green biofluorescence signal from the transplanted GFP+ cells increased significantly and was maintained at a high level during the first 4 weeks after surgery. Immunofluorescence analyses of tooth specimens collected at 8 weeks postsurgery showed the presence of nestin+/GFP+, α smooth muscle actin (α-SMA)/GFP+, and NeuN/GFP+ cells within the regenerated pulplike tissue. CONCLUSIONS: These data confirm that transplanted bone marrow-derived cells can contribute to dental pulp regeneration.

Experience in clinical diagnosis and treatment of duodenal tumors.

Small bowel tumors are rare tumors. Duodenal tumors occur more commonly compared with other small intestinal tumors. To summarize the clinicopathological features of duodenal tumors, in the present study 44 cases of duodenal tumors were collected, and the comparative clinicopathological characteristics between tumors of the ampulla and non-ampulla, the choice of treatment, and differences in the prognosis, were analyzed. The pathological type identified was predominantly adenocarcinoma; periampullary duodenal tumors were almost classifiable as adenocarcinoma in terms of their type. Non-ampulla duodenal tumors also included rare pathological types, such as stromal tumor and large B-cell lymphoma. The symptoms of duodenal tumors were non-specific, therefore rendering early diagnosis and treatment difficult. Due to jaundice, periampullary duodenal tumors were diagnosed earlier than non-ampulla duodenal tumors. Endoscopy and computed tomography (CT) examinations were valuable in terms of diagnosis, and were used as a means of screening. Carcinoembryonic antigen (CEA) and cancer antigen 199 (CA199) were revealed to be important as biomarkers. Radical surgery was the most effective treatment. Pancreaticoduodenectomy was revealed to be applicable in all cases of duodenal tumors. For non-ampulla duodenal tumors, partial duodenum resection and subtotal gastrectomy were appropriate for selection as methods of treatment. No survival benefits were identified for adjuvant chemotherapy. Duodenal tumors were shown to be a rare neoplasm with atypical symptoms; they should be diagnosed and treated as early as possible; CT and gastroscopy may be used for screening, radical surgery offers the best treatment; pancreatoduodenectomy is not the only surgery option available; and chemotherapy did not result in any survival benefits.

Glabrous Flow-Through Flaps for Simultaneous Resurfacing, Revascularization, and Reinnervation of Digits.

INTRODUCTION: Composite injuries of the volar surfaces of fingers are frequently associated with digital vessel and nerve damage. Flow-through glabrous flaps can provide esthetic tissue coverage as well as revascularization, and using a neurovascular flap, allows primary reconstruction of the digital nerve. METHODS: Between June 2010 and August 2014, we prospectively studied the use of Microsurgical flow-through glabrous flaps to achieve simultaneously digital revascularization and soft tissue coverage in 13 fingers of 12 patients who experienced volar injuries, comprising 6 great toe fibular flaps, 3 medial plantar flaps, 1 pedis medialis flap, and 3 hypothenar flaps. The nerve passing through the great toe fibular flap or medial plantar flap was used to repair digital nerve defects. RESULTS: All flaps survived completely. During a mean follow-up period of 13.6 months, the majority recovered excellent appearance and function. The flaps had the characteristics of normal finger volar skin: hairless, with similar texture and color. The mean static 2-point discrimination and Semmes-Weinstein monofilament scores of finger pulp were 4.8 and 3.03 mmin the great toe fibular flap group, 7.3 and 3.89 mm in the medial plantar flap group, and 7.5 and 3.84 mm in the sural nerve group. CONCLUSIONS: Glabrous flow-through flaps provide excellent reconstruction for fingers with volar injuries associated with digital vessel damage. The great toe fibular flap and the medial plantar flap are reliable and useful options for complicated finger injuries associated with digital vessel and nerve injuries.

Association between prognostic factors and clinical outcome of well-differentiated thyroid carcinoma: A retrospective 10-year follow-up study.

Differentiated thyroid carcinoma (DTC) is one of the most common metabolic disorders and accounts for 98% of all cases of thyroid cancer. Previously, a number of studies have investigated the prognostic factors associated with well-differentiated thyroid carcinoma (WDTC); however, these studies yielded conflicting results. The current study used a retrospective study design to collect data from WDTC patients who had received the same treatment regimen from the same institute, with a minimum follow-up of 10 years. The De Groot staging system was used to classify WDTC in a total of 320 patients (240 females and 80 males). Among the subjects, the pathological subtypes identified were as follows: Papillary carcinoma (240 cases, 75%), follicular carcinoma (67 cases, 21%) and Hürthle cell carcinoma (13 cases, 4%). Prognostic factors that significantly affected the clinical outcome of the disease were advanced age (P=0.001), tumor size (P=0.03), presence of thyroglobulin (P=0.001) and De Groot stage (P=0.005). The 10-year follow-up study revealed that WDTC is associated with a high survival rate of 96% (307/320 patients survived) and a low mortality rate (4%).