Corticosteroid Injection for Morton’s Interdigital Neuroma: A Systematic Review

Background@#This review aimed to evaluate the effects of corticosteroid injections on Morton’s neuroma using an algorithmic approach to assess the methodological quality of reported studies using a structured critical framework. @*Methods@#Several electronic databases were searched for articles published until April 2020 that evaluated the outcomes of corticosteroid injections in patients diagnosed with Morton’s neuroma. Data search, extraction, analysis, and quality assessments were performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, and clinical outcomes were evaluated using various outcome measures. @*Results@#With 3–12 months of follow-up, corticosteroid injections provided satisfactory outcomes according to Johnson satisfaction scores except in two studies. Visual analog scale scores showed maximal pain reduction between 1 week and 3 months after injection. We found that 140 subjects out of 469 (29.85%) eventually underwent surgery after receiving corticosteroid injections due to persistent pain. @*Conclusions@#Corticosteroid injections showed a satisfactory clinical outcome in patients with Morton’s interdigital neuroma although almost 30% of the included subjects eventually underwent operative treatment. Our recommendation for future research includes using more objective outcome parameters, such as foot and ankle outcome scores or foot and ankle ability measures. Moreover, studies on the safety and effectiveness of multiple injections at the same site are highly necessary.

Corticosteroid Injection for Morton’s Interdigital Neuroma: A Systematic Review

Background@#This review aimed to evaluate the effects of corticosteroid injections on Morton’s neuroma using an algorithmic approach to assess the methodological quality of reported studies using a structured critical framework. @*Methods@#Several electronic databases were searched for articles published until April 2020 that evaluated the outcomes of corticosteroid injections in patients diagnosed with Morton’s neuroma. Data search, extraction, analysis, and quality assessments were performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, and clinical outcomes were evaluated using various outcome measures. @*Results@#With 3–12 months of follow-up, corticosteroid injections provided satisfactory outcomes according to Johnson satisfaction scores except in two studies. Visual analog scale scores showed maximal pain reduction between 1 week and 3 months after injection. We found that 140 subjects out of 469 (29.85%) eventually underwent surgery after receiving corticosteroid injections due to persistent pain. @*Conclusions@#Corticosteroid injections showed a satisfactory clinical outcome in patients with Morton’s interdigital neuroma although almost 30% of the included subjects eventually underwent operative treatment. Our recommendation for future research includes using more objective outcome parameters, such as foot and ankle outcome scores or foot and ankle ability measures. Moreover, studies on the safety and effectiveness of multiple injections at the same site are highly necessary.

Clinical and Radiological Results with Second-Look Arthroscopic Findings after Open Wedge High Tibial Osteotomy without Arthroscopic Procedures for Medial Meniscal Root Tears

PURPOSE: To identify the structural integrity of the healing site after medial open wedge high tibial osteotomy (MOWHTO) in patients with a posterior root tear of the medial meniscus (PRTMM) and chondral lesion by second-look arthroscopy and to determine the clinical and radiological findings. MATERIALS AND METHODS: From August 2010 to June 2016, 52 consecutive patients underwent MOWHTO and arthroscopic examination without a chondral resurfacing procedure and meniscal treatment for PRTMM. Twenty-four patients were available for second-look arthroscopic evaluation. The mean follow-up period was 19.5 months (range, 5 to 46 months). Clinical evaluation was based on the Lysholm knee scores and Hospital for Special Surgery (HSS) scores. RESULTS: There were 5 lax healing, 6 scar tissue, 13 failed healing of PRTMM. Definite change of chondral lesion was not observed. The Kellgren-Lawrence grade did not improve according to the follow-up plain radiograph. The mean Lysholm score improved from 34.7 preoperatively to 77.1 at the last follow-up, and the mean HSS score significantly increased from 36.5 to 82.4. CONCLUSIONS: This study revealed a low rate of healing potency of PRTMM and chondral lesion after MOWHTO without any attempt for meniscal treatment or chondral resurfacing. The cartilage and healing status of PRTMM was not associated with improved clinical outcomes and radiological findings.

Anatomical Relationships between Muscles Overlying Distal Transverse Carpal Ligament and Thenar Motor Branch of the Median Nerve

BACKGROUND: The purpose of the current study is to investigate anatomical relationships between the muscle overlying the distal transverse carpal ligament (TCL) and the thenar motor branch of the median nerve. METHODS: Of the 192 wrists that underwent open carpal tunnel release, a muscle belly overlying the TCL was observed on the distal margin of TCL in 25 wrists and ligament exposure could not be achieved without transection of it. We recorded surgical findings of these 25 wrists. The origin of the recurrent motor branch arising from the major median nerve was marked on the axial and coronal section diagrams of the wrist. RESULTS: The presence of muscle overlying the TCL was seen in 25 wrists (21 patients, 13%). The locations of origin were distributed not only on the radial side but anterior or ulnar side of the major median nerve. Abnormal branches originated from the unusual side in 14 cases (56% of those with a muscle overlying the TCL): central-anterior side in eight cases, ulnar-anterior side in five cases, and ulnar side in one case. These anomalous branches were frequently associated with the muscle belly overlying the TCL in our study regardless of the origin site. The branches were prone to cut if careless midline incision along the third web space was performed. Unusual origin and aberrant pathway of the recurrent thenar motor branch were associated with the presence of a muscle overlying the TCL. CONCLUSIONS: A thorough knowledge of the standard and variant anatomy of the muscle belly and recurrent motor branch in the carpal tunnel is fundamental to prevention of complications such as muscle wasting or atrophy by iatrogenic motor branch injury during carpal tunnel release.

Recent Updates on the Treatment of Lateral Epicondylitis

The natural course of lateral epicondylitis is widely regarded to be self-limiting within 1 year of symptom duration in 90% of all patients. The spectrum of treatments include simple ‘wait and see', bracing, physical therapy, corticosteroid injection, and recently some biologic injection such as autologous blood and platelet rich plasma. However, recalcitrant lateral epicondylitis which are not responding to conservative treatments can be treated with surgical treatment although much remains unclear regarding the ideal treatment. Debates surrounding open procedures are the management for the defect after resection of pathologic tissue, necessity of decortication, selective denervation procedure, etc. Since the trend is changing to minimal invasive surgery and arthroscopic release of extensor carpi radialis brevis tendon are becoming more popular these days, surgical tips and pitfall to obtain good results and avoid complications have been reported recently. Bipolar radiofrequency (RF)-based microtenotomy or percutaneous tendon release is another surgical procedures reported to be effective in lateral epicondylitis. However, there are some patients who present with persistent pain after surgical treatment. Thus, selection of ideal candidates for surgery, thorough evaluation of all pathologies prior to surgery, and adequate surgical procedures would be essential in the surgical treatment of lateral epicondylitis.

Huge Pseudoaneurysm of Popliteal Artery Following Conservative Treatment of a Distal Femur Fracture: A Case Report

A pseudoaneurysm is a contained arterial disruption in the intimal and medial layers of an arterial wall. It may originate from a perforation caused by traumatic or iatrogenic injury or the dehiscence of a surgical anastomosis. Because of its insidious onset and delayed presentation, orthopaedic surgeons should be aware of the possibility of such a lesion after an initial trauma. We report on a case of a delayed huge pseudoaneurysm of the popliteal artery that occurred 11 months after conservative treatment of a supracondylar fracture of the femur in order to keep in mind the possibility of the delayed presentation of vascular injury after a distal femur fracture.

Minimal Medial-row Tie with Suture-bridge Technique for Medium to Large Rotator Cuff Tears

BACKGROUND: The purpose of this study was to evaluate the postoperative magnetic resonance imaging (MRI) results of minimal-tying (one medial-row tie among 4 medial-row sutures) on the medial-row in double-row suture-bridge configuration (2x2 anchor with 4x4 suture stands). METHODS: From 2011 March to 2012 July, 79 patients underwent arthroscopic rotator cuff repair using 2x2 anchor double-row configuration. The mean age was 61.3 years (range, 31-81 years). Two double-loaded suture anchors were used for medial-row. Four medialrow stitches were made with only one medial-row knot-tying (the most anterior suture). Lateral-row was secured using the conventional suture-bridge anchor technique; all 4 strands were used for each anchor. Repair integrity was evaluated with MRI at mean 6.2 months postoperatively. Retear and the pattern of retear, change of fatty infiltration, and muscle atrophy of supraspinatus were evaluated using pre- and postoperative MRI. RESULTS: Repaired tendon integrity was 38 for type I, 30 for type II, 6 for type III, 4 for type IV, and 1 for type V, according to Sugaya classification. Considering type IV/V as retear, the rate was 6.3% (5 out of 79 patients). Medial cuff failure was observed in 4 patients. Fatty atrophy of supraspinatus was significantly improved postoperatively according to Goutallier grading (p=0.01). The level of muscle atrophy of supraspinatus was not changed significantly after surgery. CONCLUSIONS: Minimal tying technique with suture configuration of four-by-four strand double-row suture-bridge yielded a lower retear rate (6.3%) in medium to large rotator cuff tears.

A Comparative Study of Subcutaneous versus Intra-Articular Indwelling Closed Suction Drainage after Total Knee Arthroplasty / 대한정형외과학회잡지

PURPOSE: The aim of this study was to compare the drainage amount, total blood loss, and clinical results between two different positions of suction drainage after total knee arthroplasty. MATERIALS AND METHODS: A total of 100 patients who underwent one stage bilateral total knee arthroplasty were enrolled. In experiment 1 with 50 patients, we compared the drainage amount, pain, range of motion, and complications of the leg whose suction drain was inserted into the joint cavity with those of the contralateral leg whose suction drain was inserted in subcutaneous tissue. Another 50 patients of experiment 2 had suction drainage in the joint cavity of both legs and the total blood loss (sum of drainage output, exudates, and hematoma of subcutaneous tissue and joint) was calculated and compared with that of experiment 1. RESULTS: In experiment 1, the drainage amount was less in the leg with suction drainage in subcutaneous tissue compared with the contralateral leg with suction drainage in the joint cavity (p<0.001). However, the postoperative joint pain was significantly different only on post-operative day 2 between two legs. In experiment 2, there was no significant difference in the total blood loss between the two groups. CONCLUSION: Although the drainage amount was less in the leg whose suction drain was kept in subcutaneous tissue compared with the contralateral leg whose suction drain was in the joint cavity, the total blood loss and the clinical results were not significantly different according to the position of the suction drain. Therefore, we can conclude that the subcutaneous position of the suction drain did not yield superior results.

Ulnar Artery Thrombosis in Guyon's Canal

Causes of ulnar nerve compression in Guyon's canal are various, but thrombosis of the ulnar artery due to a single trauma is rarely reported. We report a case of ulnar nerve compression caused by traumatic thrombosis of the ulnar artery in Guyon's canal. Surgical excision of the ulnar artery thrombus and end to end anastomosis resulted in complete relief of the patient's symptoms.

Minimal Medial-row Tie with Suture-bridge Technique for Medium to Large Rotator Cuff Tears

BACKGROUND: The purpose of this study was to evaluate the postoperative magnetic resonance imaging (MRI) results of minimal-tying (one medial-row tie among 4 medial-row sutures) on the medial-row in double-row suture-bridge configuration (2x2 anchor with 4x4 suture stands). METHODS: From 2011 March to 2012 July, 79 patients underwent arthroscopic rotator cuff repair using 2x2 anchor double-row configuration. The mean age was 61.3 years (range, 31-81 years). Two double-loaded suture anchors were used for medial-row. Four medialrow stitches were made with only one medial-row knot-tying (the most anterior suture). Lateral-row was secured using the conventional suture-bridge anchor technique; all 4 strands were used for each anchor. Repair integrity was evaluated with MRI at mean 6.2 months postoperatively. Retear and the pattern of retear, change of fatty infiltration, and muscle atrophy of supraspinatus were evaluated using pre- and postoperative MRI. RESULTS: Repaired tendon integrity was 38 for type I, 30 for type II, 6 for type III, 4 for type IV, and 1 for type V, according to Sugaya classification. Considering type IV/V as retear, the rate was 6.3% (5 out of 79 patients). Medial cuff failure was observed in 4 patients. Fatty atrophy of supraspinatus was significantly improved postoperatively according to Goutallier grading (p=0.01). The level of muscle atrophy of supraspinatus was not changed significantly after surgery. CONCLUSIONS: Minimal tying technique with suture configuration of four-by-four strand double-row suture-bridge yielded a lower retear rate (6.3%) in medium to large rotator cuff tears.

Large Cavernous Hemangioma of the Subscapularis Muscle: A Case Report

We report a case of intramuscular hemangioma in the subscapularis muscle and the resulting impairment of shoulder function in an adult patient. A nineteen-year-old female complained of shoulder pain and the development of a mass in the absence of previous trauma. Physical examinations, including lift-off and belly-press tests, showed abnormality. X-ray showed multiple calcifications in the front of the scapula. Magnetic resonance imaging showed a soft-tissue mass occupying almost the entire intramuscular portion of the subscapularis muscle. An arthroscopic examination excluded the possibility of a joint invasion, after which the entire mass was successfully removed by open excision. The displacement of the subscapularis by the mass was relieved after the surgery. Pathological diagnosis of the tissue confirmed a cavernous hemangioma. Both shoulder pain and function was improved after operation. There was no evidence of recurrence even at the 2-year follow-up. Rare forms of hemangioma adjacent to the shoulder joint could be successfully managed with surgical excision. Differential diagnosis, such as synovial chondromatosis, pigmented villonodular synovitis, and malignant sarcoma, should also be considered.

Symptomatic Neural Loop of the Distal Ulnar Nerve / 대한정형외과학회잡지

We found a unique anatomical variant of the distal ulnar nerve, a neural loop encompassing the flexor carpi ulnaris during Guyon's canal exploration. Compression by the flexor carpi ulnaris during active wrist movement was suspected as the cause of ulnar neuropathy. The symptom was relieved after neurolysis and release of surrounding tissue. With regard to the ulnar side wrist pain, which is suspicious for ulnar compression syndrome at the wrist level, the surgeon should always suspect anomalous nerve branch as source of compressive neuropathic pain.

Intramedullary Nailing of Distal Tibial Fractures with Percutaneous Reduction by Pointed Reduction Forceps

PURPOSE: The purpose of this study is to analyze the radiographic and clinical results of intramedullary nailing after percutaneous reduction using pointed reduction forceps for spiral or oblique fractures of the distal tibia. The benefit of percutaneous reduction using pointed reduction forceps in anatomical reduction and maintenance was assessed. MATERIALS AND METHODS: From January 2005 to December 2009, 47 cases of distal one-third tibial fracture were managed by intramedullary nailing using pointed reduction forceps. Thirty-eight cases were spiral fracture and nine cases were oblique fracture. In all cases, the percutaneous reduction was achieved using pointed reduction forceps under fluoroscopy control. While maintaining the reduction with the pointed reduction forceps, the intramedullary nail was inserted. The pointed reduction forceps were removed after insertion of proximal and distal inter-locking screws. Alignment was evaluated with anterior-posterior and lateral radiographs taken immediately post-operation and at the time of union. RESULTS: At immediate post-operation, the mean displacement of valgus and anterior angulation was 0.57degrees and 0.24degrees, respectively. That of valgus and anterior angulation at bone union was 0.37degrees and 0.16degrees, respectively. The average duration of bone union was 16.1 weeks. CONCLUSION: Intramedullary nailing with percutaneous reduction using pointed reduction forceps for distal tibial fractures was an easy and effective method for achievement of accurate alignment intra-operatively. Accurate alignment was successfully maintained until bone union.

Perioperative Risk Assessment in Patients Aged 75 Years or Older: Comparison between Bilateral and Unilateral Total Knee Arthroplasty

PURPOSE: The purpose of this study is to evaluate the risk of sequential bilateral total knee arthroplasty (TKA) under 1 anesthesia in patients 75 years or older. MATERIALS AND METHODS: Patients aged 75 years or older who underwent sequential bilateral TKA (bilateral group, n=159) and unilateral TKA (unilateral group, n=159) between 2002 and 2012 were selected. All patients were evaluated for underlying medical diseases, such as cardiac, pulmonary, and renal problems, and high-risk patients were recommended to postpone the surgery. We compared the underlying diseases, major postoperative complications, and the length of hospital stay between bilateral and unilateral groups. RESULTS: The prevalence of underlying diseases of the bilateral group was 74.8% and major complications occurred in 6 patients (3.8%). The prevalence of underlying diseases of the unilateral group was 52.4% and complications were observed in 4 patients (2.4%). Although the complication rate of the bilateral group was slightly higher than that of the unilateral group, the difference was not statistically meaningful (p=0.204). The length of hospital stay was 21.9 days for the bilateral group and 24.9 days for the unilateral group. CONCLUSIONS: There was no significant difference in postoperative complications between groups. The result shows that bilateral TKA can be relatively safe compared with unilateral TKA in patients 75 years or older. However, careful selection of low-risk patients is advised.

Large Cavernous Hemangioma of the Subscapularis Muscle: A Case Report

We report a case of intramuscular hemangioma in the subscapularis muscle and the resulting impairment of shoulder function in an adult patient. A nineteen-year-old female complained of shoulder pain and the development of a mass in the absence of previous trauma. Physical examinations, including lift-off and belly-press tests, showed abnormality. X-ray showed multiple calcifications in the front of the scapula. Magnetic resonance imaging showed a soft-tissue mass occupying almost the entire intramuscular portion of the subscapularis muscle. An arthroscopic examination excluded the possibility of a joint invasion, after which the entire mass was successfully removed by open excision. The displacement of the subscapularis by the mass was relieved after the surgery. Pathological diagnosis of the tissue confirmed a cavernous hemangioma. Both shoulder pain and function was improved after operation. There was no evidence of recurrence even at the 2-year follow-up. Rare forms of hemangioma adjacent to the shoulder joint could be successfully managed with surgical excision. Differential diagnosis, such as synovial chondromatosis, pigmented villonodular synovitis, and malignant sarcoma, should also be considered.

The Prevalence of Os Acromiale in Korean Patients Visiting Shoulder Clinic

BACKGROUND: The prevalence of os acromiale has been documented to be between 1% and 15% and is known to be clinically associated with subacromial impingement or rotator cuff tear. However, the prevalence of os acromiale in Korea has not yet been determined. The purpose of this study is to evaluate the prevalence of os acromiale in Korean patients who visited shoulder clinics and to investigate the correlations with rotator cuff tear. METHODS: We retrospectively reviewed the X-rays of patients visiting a shoulder clinic at a tertiary hospital in Korea from January 2011 to January 2012 to determine the frequency of os acromiale. X-ray findings were confirmed with magnetic resonance imaging (MRI) for patients who had these images available. MRI was also used to assess the status of the rotator cuff. The correlation between the presence of os acromiale either with gender, hand dominance or rotator cuff tear was analyzed statistically. RESULTS: A total of 2,946 shoulders from 1,568 patients were analyzed with X-rays. Thirteen cases out of 1,568 patients had an os acromiale; and there were five and eight cases of pre-acromiale and meso-acromiale, respectively. Thus, the prevalence of os acromiale in this study population was found to be 0.7 (7 cases per 1,000 patients). Bilaterality was found in two cases. Os acromiale was not more frequent according to gender (five males versus eight females, p = 0.525) and hand dominance was not associated with frequency of os acromiale (seven dominant arms versus six non-dominant arms, p = 0.631). A sub-analysis of shoulders with available MRIs (1,074 shoulders) revealed that there were two rotator cuff tears (40%) out of five cases of os acromiale, whereas 607 rotator cuff tears were observed (57%) among 1069 cases without os acromiale. This difference was not statistically significant (p = 0.656). CONCLUSIONS: The identified prevalence of os acromiale in Korean patients who visited shoulder clinics is 0.7%, which is much lower as compared with the prevalence of general population from other ethnic groups. No correlation was observed between rotator cuff tears and os acromiale in this study population.

Preoperative Prediction for Length of Patellar Tendon in Anterior Cruciate Ligament Reconstruction Using Bone-Patellar Tendon-Bone Autograft / 대한스포츠의학회지

Preoperative prediction of patellar tendon length is important during anterior cruciate ligament (ACL) reconstruction using bone-patellar tendon-bone (BPTB) autograft. Three methods of imaging analysis to predict patellar tendon length were compared in this study. One hundred and twenty-three patients who underwent ACL reconstruction using BPTB autograft by single surgeon during October 2002 through April 2011 were included. We measured the patellar tendon length from true and oblique lateral simple radiographs (classified according to degree of rotation) and magnetic resonance image (MRI). These values were compared with actual length measured during operation and assessed accuracy by calculating the coefficient of determination. The mean length of patellar tendon measured during operation and by true lateral and oblique lateral radiographs and MRI were 42.4+/-0.45 mm (range, 32.0-54.0 mm), 41.7+/-0.61 mm (range, 24.2-55.3 mm), 40.7+/-0.57 mm (range, 24.8-51.5 mm), and 41.7+/-0.52 mm (range, 28.7-56.0 mm), respectively. The correlation of patellar tendon length was the most strong between actual length and value from true lateral radiograph (coefficient of determination, r2=0.660) according to simple linear regression analysis. R2 values were 0.361 and 0.332 for oblique lateral radiograph and MRI compared to actual value, respectively. In conclusion, Patellar tendon length measured on true lateral radiograph was the best method to coincide with actual patellar tendon length among various preoperative prediction methods.

An Extramedullary Femoral Alignment System in Total Knee Arthroplasty Using the Inter-Femoral Head Center Distance / 대한정형외과학회잡지

PURPOSE: Total knee arthroplasty using the extramedullary technique for alignment has some difficulty for detecting the center of the femoral head intra-operatively. In this study we tried to evaluate the usefulness and accuracy of a newly developed Mechanical Axis Marker that synchronizes the center of the knee joint and femoral head with the mechanical axis for the distal femoral cutting and femoral prosthesis alignment. MATERIALS AND METHODS: Between October 2008 and January 2009, 255 knees in 156 patients underwent total knee arthroplasty. We measured the distance between each centers of the femoral head using the PACS system and we applied the distance to the newly developed Mechanical Axis Marker. Subsequently, we applied the new marker to patients to align the centers of knee, the femoral head and the marker in line with the mechanical axis intra-operatively. The accuracy of the marker was validated with C-arm fluoroscopy pre-operatively in 20 patients. Post-operatively we measured and analyzed the frontal femoral component angle to evaluate the coronal alignment of the femoral implant. The accuracy was rated as excellent when the alignment was 5degrees. RESULTS: The pre-operative validation study with the C-arm fluoroscopy showed that the distance between the femoral head center and the metal peg of the marker was within 5 mm in 95% of the patients, which implied acceptable accuracy. The average frontal femoral component angle against the mechanical axis was 89.0degrees+/-1.1 (range 86degrees-96.6degrees). The proportion of excellent, good, and poor alignments was 90.6% (231 cases), 8.6% (22 cases), and 0.8% (2 cases), respectively. The intraclass correlation coefficient between the two observers for the frontal femoral component angle was 0.972 which showed high concordance. CONCLUSION: Our results indicate that the extramedullary technique assisted by our new Mechanical Axis Marker can easily identify the center of femoral head and improve the accuracy of frontal femoral component alignment with the proper mechanical axis.

Evidence that the fully assembled capsid of Leishmania RNA virus 1-4 possesses catalytically active endoribonuclease activity

In this study, Leishmania RNA virus 1-4 (LRV1-4) particles purified from host Leishmania guyanensis promastigotes were examined for capsid endoribonuclease. Temperature optimum for the endoribonulease activity was found to be at 37degrees C to 42degrees C and the activity was specifically inhibited by the aminoglycoside antibiotics, neomycin, kanamycin, and hygromycin and by 100 mM levels of NaCl or KCl. To determine the catalytic domain of the capsid endoribonuclease activity, three point-mutation at cysteine residues at C47S (P1), C128/ 133S (P2), and C194R (P3) were prepared and each gene was constructed into baculoviruses and expressed in Sf9 insect cells. LRV1-4 capsid N- terminus (N2 and N3) and C-terminus (C1 and C2) deletion mutants (Cadd et al., 1994) were also examined by in vitro RNA cleavage assay. The results showed that the capsid mutants; C1, C2, N3, P1, and P2 were capable of forming proper virus-like particles (VLPs) and they all possessed the specific endoribonuclease activity. However, two assembly-defective capsid mutants, N2 (N- terminus 24-amino acids deletion) and P3 mutants, did not retain the specific endoribonuclease activity. Taken together, the results suggest that at least 24 amino acids from the N-terminal region and C194 residue in LRV1-4 capsid protein are functionally important for LRV1-4 viral assembly and the capsid endoribonuclease activity may be dependent upon the properly assembled LRV1-4 virus particles.