The role of sentinel lymph node biopsy in early-stage cervical cancer: A systematic review.

Pelvic lymphadenectomy procedure is included as part of the standard protocol of radical hysterectomy for women with early-stage cervical cancer (Stage IA to IB1). However, an important sequel to lymphadenectomy procedure is the possible occurrence of lymphedema in the lower abdomen and lower extremities. Previous researches also find that women with lymphedema experience many emotional impacts, including depression, anxiety, and adjustment problems. Only approximately 10% of women with clinical stage IB cervical carcinoma were involved with metastatic disease. If we could better define the relevant lymphatic nodes that must be removed, it is then possible to limit routinely performed lymphadenectomy for regional nodal metastasis in the pelvis, and hence reduce the need for extended surgical staging (para-aortic lymphadenectomy). We systematically reviewed a body of literature and updated available information concerning the current progress on the application of sentinel lymph node biopsy in women with early-stage cervical cancer. All detection methods (preoperative injection of radiocolloid tracer, intraoperative injection of blue dye, or a combination of both techniques) demonstrated reasonable sensitivity (with a few exceptions), high specificity, low false-negative rate and high negative predictive value. The review of the literature in this paper should convince the readers that sentinel lymph node biopsy has the potential to improve the quality of life and the possibility to maintain relapse-free survival for women with cervical cancer. The proper identification of negative sentinel lymph node allows individualized therapy and may preclude the need of lymphadenectomy procedure in most of these women.

Gender Gap and Risk Factors for Poor Stroke Outcomes: A Single Hospital-Based Prospective Cohort Study.

BACKGROUND: This study intended to investigate whether etiological stroke subtypes and their corresponding major risk factors have differential effects on outcomes between genders. PATIENTS AND METHODS: We enrolled 403 consecutive patients with first-ever acute ischemic stroke (170 women, 233 men), from a referral hospital in Taiwan over a 2-year period. Gender differences in demographics, vascular risk factors, access to health care, etiological stroke subtypes, stroke severity, and outcomes were examined. The primary outcome variable of the study was any unfavorable outcome due to acute ischemic stroke, defined as a modified Rankin Scale score of 3 or higher at 90 days after stroke. Multivariable logistic regression models were used to identify predictors of poor outcomes. RESULTS: There were no gender disparities in baseline severity, stroke subtypes, access to health care, and medical comorbidities. Although women had poorer outcomes, female gender was not a predictor of unfavorable outcomes. Important predictors included age of 75years or older (odds ratio [OR] = 2.67; 95% confidence interval [CI], 1.46-4.90), National Institutes of Health Stroke Scale greater than or equal to 8 (OR = 8.38; 95% CI, 4.61-15.2), lack of cohabitation (OR = 2.13; 95% CI, 1.26-3.61), subtypes of cardioembolism (OR = 2.76; 95% CI, 1.29-5.93), and large-artery atherosclerosis (OR = 2.93; 95% CI, 1.47-5.85). In subgroup analyses, the gender-specific independent predictors were cardioembolism (OR = 7.42; 95% CI, 2.21-24.9) or atrial fibrillation (OR = 3.57; 95% CI, 1.31-9.74) in women, and large-artery atherosclerosis (OR = 3.35; 95% CI, 1.30-8.64) or symptomatic large-artery stenosis (OR = 3.42; 95% CI, 1.69-6.96) in men. The differential effects of these predictors according to gender were revealed by interaction tests. CONCLUSION: Atrial fibrillation and symptomatic large-artery stenosis are predictors of poor stroke outcomes in women and men, respectively.

Complex coil assisted single coil embolization for small intracranial aneurysm.

The purpose of the technical note is to introduce the complex coil assisted coil embolization method in the treatment of intracranial small aneurysm, in order to enhance the safety of the procedure. The first microcatheter was navigated into the aneurysm sac and the ultrasoft coil was used as the embolization coil. If the embolizations coil could not stay within the aneurysm sac smoothly, such as coil herniation into parent artery during the delivery process. The second microcatheter would be navigated to the aneurysm level in the parent artery. Another complex coil was delivered within the parent artery via the second microcatheter to provide the neck bridge effect in order to enhance the stability of embolization coil. Besides, the protection coil will not disturb the parent artery flow. While the embolization coil was put into the aneurysm sac smoothly under the help of complex protective coil, the protective coil was then withdrawn gently. We use the most magnified view, dual-plane approach simultaneously to observe the stability of embolization coil. The embolization coil would be detached without any evidence of coil motion or vibration. The new method could provide the physiological protective method, without leaving any protective device such as stent within the parent artery.

Iatrogenic and fatal arterial air embolism during the CT scan.

Systemic and fatal arterial air embolism during the computed tomography (CT) scan is rarely reported in English-based literature. Iatrogenic air embolism happening during the CT scan is often related to the injector, usually venous air embolism and asymptomatic. We report one fatal and extensive systemic arterial air embolism because of one error that happened during a brain CT scan. The mechanism is different from the reported cases in the literature. The possible mechanism and pathogenesis are well discussed to alert clinicians and prevent the recurrence of such complication.

Preoperative embolization of carotid body tumor by direct percutaneous intratumoral injection of N-butyl cyanoacrylate glue assisted with balloon protection technique.

Substantial intraoperative bleeding during surgical removal of carotid body tumor may be a major problem in the management of these highly vascularized tumors. Traditional preoperative embolization via a transarterial access has proved effective but is often limited by complex vascular anatomy and small feeding vessels that is difficult to catheterize. We report two cases of carotid body tumor treated with direct puncture and intratumoral injection of N-butyl cyanoacrylate glue (NBCA) assisted with balloon protection technique for preoperative devascularization. The result was impressive and minimal bleeding loss during surgery was observed.

Neonatal intracranial aneurysm rupture treated by endovascular management: a case report.

Pediatric intracranial aneurysm rupture is rare, and is traditionally managed by surgical clipping. To the best of our knowledge, endovascular embolization of aneurysms in neonates has not previously been reported in Taiwan. We report a 9-day-old boy with intracranial aneurysms who underwent endovascular embolization, representing the youngest reported case in Taiwan. The 9-day-old boy presented with non-specific symptoms of irritable crying, seizure and respiratory distress. Computed tomography disclosed intraventricular hemorrhage, subarachnoid hemorrhage and focal intracranial hemorrhage around the right cerebellum. Subsequent computed tomographic angiography showed two sequential fusiform aneurysms, measuring 3 mm, located in the right side posterior inferior cerebellar artery (PICA). The patient underwent endovascular embolization because of the high risk of aneurysm re-rupture and the impossibility of surgical clipping due to the fusiform nature of the aneurysms. A postembolization angiogram revealed complete obliteration of the right distal PICA and proximal aneurysm. The distal PICA aneurysm was revascularized from the collateral circulation, but demonstrated a slow and delayed filling pattern. The patient's condition remained stable over the following week, and he was discharged without anticonvulsant therapy. No significant developmental delay was noted at follow-up at when he was 3 months old. This case emphasizes the need for clinical practitioners to consider a diagnosis of intracranial hemorrhage in neonates with seizure and increased intracranial pressure. Neonatal intracranial aneurysms can be treated safely by endovascular treatment.

Bilateral developing reexpansion pulmonary edema treated with extracorporeal membrane oxygenation.

A right-side spontaneous pneumohemothorax developed in a 16-year-old boy who was transferred from a local medical department to our emergency department 12 hours later. After an emergency operation to remove the blood clot, right-side reexpansion pulmonary edema developed, with about 3100 mL of foamy and bloody fluid drainage from the right-side endotracheal tube. The patient was sent to the intensive care unit with differential lung ventilation, but developed left-side pulmonary edema resulting in worsening oxygen saturation. Further extracorporeal membrane oxygenation support was used. The patient recovered gradually, and the endobronchial tube was removed 5 days later.

Alternative option in the treatment of very small ruptured intracranial aneurysms.

BACKGROUND: To evaluate the safety and protective effect of relative undersized coil with loose coil core in the clinical dilemma condition--very small (43.0 mm) ruptured intracranial aneurysm. METHODS: We studied 12 patients (4 men, 8 women) who had suffered from acute ruptured small intracranial aneurysms (2-3 mm in size, with SAH presentation). All subjects underwent a single coil embolization procedure. An undersized coil (equivalent to the neck size or 0.5 mm smaller than the aneurysm diameter) was chosen as the embolizer. Based on the postembolization angiogram, subjects were divided into 2 groups. One was labeled as the initial complete obliteration group (NR) and the other as the incomplete obliteration group (SR). Fisher exact test and the Wilcoxon rank sum test were used to for statistical analysis. RESULTS: The technical success rate was 100% without any procedure-related complication. The follow-up interval ranged from 6 to 32 months. No episode of rebleeding or coil migration could be defined in the admissive and following period. Loose coil core were seen in all patients. The total recurrent rate was 8.3% (1/12); only one patient suffered from recurrent lesion in SR group. CONCLUSION: The preliminary result showed that under-sized coil packing with loose coil core could provide the protective effect and prevent from further rebleeding for very small ruptured aneurysms. It should be considered as an alternative option in the treatment of acute ruptured very small aneurysms when other conventional strategies are not feasible.

Spontaneous spinal and intracranial subdural hematoma.

Subdural hematoma (SDH) of the spine following intracranial hemorrhage is extremely rare. We present a 35-year-old woman who suffered from headache and dizziness initially, and then lower back pain, lower limb weakness and paraparesis gradually developed within 1-2 weeks. Magnetic resonance imaging revealed intracranial and spinal SDH. No vascular abnormality was seen by brain and spinal angiography. Platelet count, prothrombin time, activated partial thromboplastin time, and inflammatory markers, including C-reactive protein, were normal. A diagnosis of spontaneous spinal and intracranial SDH was then confirmed surgically. Postoperative recovery was uneventful.

Angioplasty as the first-line therapeutic option for venous hypertension with outlet obstruction of dural sinus.

We describe a nonconventional endovascular approach to the treatment of pseudotumor cerebri with venous outlet stricture or obstruction. In three patients presenting with acute visual loss, angiograms showed sinus occlusion and stasis of contrast material, with an increased pressure gradient in the venous system. We used venous sinus angioplasty as the first therapeutic option. This treatment was effective, and symptoms and signs of all three patients subsided quickly. In our initial and limited experience, sinus balloon angioplasty appeared to be a good first-line treatment for patients with pseudotumor cerebri, sinus outlet obstruction and acute vision loss. We prefer to use sinus stent placement as a second-line option when initial attempts are unsuccessful, especially in pediatric and young-adult patients, as illustrated in our cases.

Percutaneous direct puncture embolization for superficial craniofacial arteriovenous malformation.

SUMMARY: Endovascular embolization for craniofacial arteriovenous malformation has been used as preoperative adjuvant devascularization or as definitive therapy. However, because the vascular network is complex, embolization via arterial access may be ineffective, risky, incomplete or technically difficult. The purpose of this report is to describe our experience of percutaneous direct venous pouch puncture embolization. Four patients with craniofacial AVMs were treated with direct puncture embolization via injection of NBCA. After the selective transarterial angiogram, the lesions were directly punctured in the venous pouch under a road map angiogram. A glue mixture was injected, and post-embolization angiograms revealed that in all patients, the lesions had been completely obliterated without complication. Percutaneous direct puncture embolization is an effective, time saving and safe technique for the superficial craniofacial AVM with prominent venous pouch.

"Waffle cone"technique for intra/extra-aneurysmal stent placement for the treatment of complex and wide-necked bifurcation aneurysm.

SUMMARY: Endovascular treatment of intracranial aneurysms by coiling has become an accepted alternative to surgical clipping (1). In cases of wide-necked and sidewall aneurysms, selective embolization is difficult because of the risk of coil protrusion into the parent vessel. The use of three-dimensional coils, stents (2), and balloon remodeling have all aided the attempt to adequately manage such lesions. However, compared with sidewall aneurysms, bifurcation aneurysms are more challenging from an endovascular standpoint. Because of their specific anatomy and hemodynamics, the tendency to recur and rerupture is higher. Several authors have reported successful treatment of these complex and wide-necked bifurcation aneurysms by using Yconfigured dual stent-assisted coil embolization (3,4), the double microcatheter technique (5), a more compliant balloon remodeling technique (6), the TriSpan neck-bridge device (7), or the waffle cone technique (8).We describe two cases of widenecked bifurcation aneurysms in which the waffle cone technique was used for coil embolization. The waffle cone technique was first described in 2006; however, the small number of published cases and the lack of follow-up prevent one from assessing this technique's durability and the probability of recanalization.We report the cases of two patients harboring unruptured wide-necked bifurcation aneurysms that were treated and followed-up for six months.

Diffusion magnetic resonance imaging as an evaluation of the response of brain metastases treated by stereotactic radiosurgery.

BACKGROUND: Loss of tumor cell results in a relative increase in extracellular space that may lead to alteration of ADC. Our purpose was to see if the ADC could be used, rather than methods depending on changes in tumor size, to predict treatment success after treatment of brain metastases with SRS. METHODS: In a prospective study, the ADCs of 21 patients with 32 solid or solid-dominated brain metastases were taken before and 1 week, 1 month, and at 3-month intervals after SRS. Mean ADC values at the various time intervals were compared with each other to see whether or not the ADC might be used as an early indicator of treatment success or failure. RESULTS: The mean pretreatment value of the ADC in the metastatic tumors was 1.05 +/- 0.12 x 10(-3) mm2/s (mean +/- SD). This value for the tumors rose significantly (P = .009) 7 days after SRS and continued to rise with time. Magnetic resonance imaging showed that 91% of these tumors had been controlled by the SRS. The ADC values in cystic/necrotic tumor tissue (2.13 +/- 0.18 x 10(-3) mm2/s) were significantly (P < .001) higher than those in noncentral necrotic tumor tissue (1.61 +/- 0.14 x 10(-3) mm2/s). CONCLUSIONS: The ADC values might eventually be useful to evaluate treatment success-and in some patients, detected even at early time points-and to distinguish radiation-induced central necrosis from tumor regrowth in cases where other imagery is not definitive.

Gastrointestinal stromal tumors: computed tomographic features and prediction of malignant risk from computed tomographic imaging.

BACKGROUND: Gastrointestinal stromal tumors (GISTs) are specific, generally Kit (CD117)-positive, mesenchymal tumors of the gastrointestinal tract encompassing a majority of tumors previously considered gastrointestinal smooth muscle tumors. Our aim was to characterize the computed tomographic findings and predict malignant risk from computed tomography for the evaluation of GISTs. METHODS: The computed tomographic images of 39 patients with pathologically and immunohistochemically proven GISTs were reviewed by 2 radiologists, and the final interpretations were reached by consensus. Images were assessed for the size, contour, growth pattern, boundary, degree of enhancement, and necrosis of the tumors. The presence of calcification within the lesions, abdominal lymphadenopathy, ascites, and bowel obstruction were also recorded. Categorical variables were compared using Fishers exact test. Univariate and multivariate logistic regression analyses were used for selection of significant predictors of high-risk malignancy. In addition, the relationships between computed tomographic features and tumor size were assessed by means of nonparametric univariate analysis with the MannWhitney U test and KruskalWallis test. RESULTS: Both old age and larger tumor size (>or= 5 cm) were statistically significant in the univariate logistic analysis for high-risk malignant tumors (p < 0.25). However, in multivariate logistic regression, only larger tumor size (>or= 5 cm) was found to have final statistical significance for high-risk malignant GISTs (p < 0.05). In addition, more exophytic growth pattern (p < 0.01), more lobulated appearance (p < 0.01), good enhancement (p < 0.05),and more necrosis (p < 0.01) of masses were more often observed in larger GISTs than small ones on computed tomography. CONCLUSION: Larger tumor size (>or= 5 cm) was found to have a predictive value with respect to high-risk malignant GISTs.

Characterization of focal brain lesions by gradient-echo arterial spin-tagging perfusion imaging.

A simple gradient-echo arterial spin tagging (GREAST) technique allows for quick assessment of regional tissue perfusion without the need for exogenous contrast agent. The purpose of this prospective study was to validate GREAST imaging in characterizing the regional perfusion status of focal brain lesions by comparing with relative cerebral blood volume (rCBV) maps obtained by using echo-planar imaging (EPI)-based dynamic susceptibility contrast MR imaging. Thirty-two patients whose nonenhanced brain MR images showed 34 focal brain lesions during routine examination were selected to immediately undergo GREAST and dynamic susceptibility contrast MR imaging to evaluate regional perfusion of the lesions. The Pearson correlation coefficient was used to test the relative quantification of local perfusion with the two imaging methods. Qualitative perfusion measurements agreed in 23 (79%) of 29 lesions for which GREAST and dynamic susceptibility contrast MR imaging were successful. On rCBV maps, six focal lesions with local hemorrhage were underestimated. In three patients with metal surgical implants, lesions could not be measured because of susceptibility artifacts and distortion on EPIs. After these lesions were excluded, the Pearson correlation coefficient between relative quantitative perfusion measurements on GREAST images versus rCBV maps was about 0.90 (p value = 0.000). The success rate of GREAST imaging was 94% (30 of 32 patients), higher than that of dynamic susceptibility contrast MR imaging (72%, or 23 of 32 patients). GREAST imaging was comparable to rCBV mapping for the relative quantification of regional perfusion of focal brain lesions. This technique may be useful in routine MR examination for characterizing the regional perfusion of brain focal lesions.

Deletion of chromosome region 18q21.3-->qter in a patient: clinical, endocrine and imaging abnormalities.

Deletion of chromosome 18q (18q-) is a survivable autosomal abnormality, having an estimated incidence of one in 40,000 live births. Common features of affected individuals include developmental delay, growth retardation, hearing impairment, delayed myelination of the brain, and craniofacial dysmorphism. We describe herein a girl with psychomotor retardation and characteristic midface hypoplasia. The clinical, radioimaging, and cytogenetic findings as occur in 18q- are compared with a terminal deletion in the long arm of chromosome 18. We also monitored the effects of growth hormone treatment for changes in growth, and the patient's height velocity increased from 3.5 cm/yr to 7 cm/yr. Her nonverbal intelligence quotient (nIQ) increased from 30 to 48. Cognition of this patient is significantly improved. However, the brain MRI was not significantly improved after growth hormone treatments changes.

Goldenhar syndrome (oculoauriculovertebral dysplasia): report of one case.

Goldenhar syndrome, also known as oculoauriculovertebral dysplasia, is an uncommon condition, characterized by a combination of anomalies: epibulbar dermoids or lipodermoids, preauricular appendices, malformation of the ears, hemifacial microsomia, vertebral anomalies, and others. The etiology of this disease has remained unclear; factors including chromosomal abnormalities, maternal diabetes mellitus or drug use, and influence of environment during pregnancy have been proposed. Here, we describe a case of Goldenhar syndrome in a 1-day-old female newborn, who presented with right external ear atresia, left preauricular appendices, cleft-like extension of the right oral angle, mandibular hypoplasia and relatively small hands. The literature on Goldenhar syndrome is briefly reviewed.

Basilar artery dolichoectasia in a boy with a combination of partial monosomy 18p and partial trisomy 20q.

We describe an 11-year-old boy with facial dysmorphism consisting of a round and flat face, hypertelorism, short nose, and down turned corners of the mouth. In addition, he had severe mental retardation, short stature, imperforate anus, and basilar artery dolichoectasia. Cytogenetic evaluation revealed an unbalanced paternally inherited translocation t(18;20)(p11.2q13.3), resulting in partial monosomy 18p and partial trisomy 20q. The combination of deletion 18pduplication 20q has not been previously described and we suggest that the unusual finding of basilar artery dolichoectasia may be a feature of one of the imbalances.

Unilateral subcortical calcification: a manifestation of dural arteriovenous fistula.

We describe the imaging findings in a dural arteriovenous fistula (AVF) with unilateral subcortical calcification. A 50-year-old woman patient suffered from hypertension and chronic headache. Recently, marked headache and a changed consciousness level were noted. The imaging studies demonstrated left subcortical calcification and cerebral sulcus effacement. MR imaging and angiography revealed multiple abnormal tortuous vessels, mainly from left external carotid artery with left-sided transverse sinus occlusion. The final diagnosis was type II a + b dural AVF (classification of Djindjian and Merland), and the patient underwent endovascular embolization and radiosurgery.

Computed tomographic appearance of internal herniation through the sigmoid mesocolon.

The case of a patient with surgically proven internal herniation of a loop of ileum through the sigmoid mesocolon is described. This 66-year-old man presented clinically with acute lower abdominal pain and an elevated white blood cell count. A computed tomography (CT) scan showed a thickened bowel loop with "bird-beak" appearance in the pelvis, centered towards the medial side and lying aside the effaced sigmoid colon. We think this CT picture is highly suggestive of internal herniation of the ileum through the sigmoid mesocolon, which is a rare clinical entity.