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Vascular access through femoral vein is commonly used for hemodialysis treatment in patients with end-stage renal disease. Consequently, iatrogenic complications, such as femoral arteriovenous fistula, are increasingly being reported in these patients. Percutaneous endovascular management of such iatrogenic arteriovenous fistulas with stent graft placement is a minimally invasive technique with decreased morbidity and hospital stay compared with surgical repair. Here, we report a case with postcatheterization arteriovenous fistula between superficial femoral artery and femoral vein which was successfully managed with a placement of a self-expanding stent graft.

Various studies have demonstrated that the lymphatic system is the additional route for solid tumor metastasis. Lymph nodes metastasis in Head and neck squamous cell carcinoma (HNSCC) is a major prognostic indicator for disease progression and a guide for therapeutic strategies. We conducted a study to compare intratumoral (IT) and peritumoral (PT) lymphatic vessel density (LVD) in HNSCC using lymphatic marker D2-40 and its correlation with lymph node metastasis, histological grading and other clinicopathological parameters. Fifty specimen of HNSCC with modified radical neck dissection tissue were included in the study group. Tissue from tumor, peritumoral tissue, tumor margin and all the lymph nodes were processed for paraffin wax blocks and histopathological diagnosis. Immunohistochemical profile of lymphatic vessels in intratumoral and peritumoral tissue was assessed by subjecting one section each from the tumor and peritumoral tissue to D2-40 immunostain. To determine LVD, four fields with the highest LVD (hot spots) were identified. The mean values were calculated by taking an average of all the measurements. The comparison of LVD between peritumoral and intratumoral area revealed significantly higher PT-LVD (P = 0.001). No significant association was seen between LVD, IT-LVD and PT-LVD and different age groups, gender, site of tumor, risk factors, size of tumor, tumor inflammation, pushing/infiltrating margin and stage of tumors. Significantly higher LVD, IT-LVD and PT-LVD was seen in association with lymph node metastasis. Both high intratumoral and peritumoral LVD were found significantly associated with the presence of lymph node metastasis, however lymphatic vessels were found to be significantly more numerous and larger in peritumoral areas as compared to intratumoral lymphatics. The specificity of D2-40 as a lymphatic endothelial marker was also confirmed. The results of our study support the possibility of using the determination of tumor lymphangiogenesis to identify patients of HNSCC who are at risk of developing the lymph node metastasis.

Objectives: The purpose of the study was to assess the incidence of hepatic vein variations on multidetector CT (MDCT) for abdominal examinations. Methods: A retrospective analysis of 534 MDCT scans was performed in patients sent for various abdominal pathologies between January 2017 and April 2019. After excluding 34 patients, finally total of 500 patients (N = 500) were included in the study. For simplification, we classified the hepatic vein variations as classified by Soyer et al, Fang et al and Cheng et al. Results: Single right hepatic vein was seen in 458 (91.6%) out of 500 patients in our study. Two right hepatic veins were seen in 36 patients out of which 27 had common trunk and nine had independent drainage into the inferior vena cava (IVC). Common trunk of middle hepatic vein (MHV) and left hepatic vein (LHV) was seen in 405 (81%) and independent drainage of MHV and LHV into the IVC was seen in 95 (19%) of patients in our study. Amongst the segmental hepatic vein variations, most common drainage of segment IV vein was into LHV (333,66.6%) followed by MHV (148,29.6%) and IVC (19,3.8%). Conclusion: Hepatic vein variations are commonly seen similar to variations in hepatic artery, portal vein and biliary anatomy. Knowledge of these variations is extremely important for transplant surgeons and intervention radiologists. Advances in knowledge: Awareness of the hepatic vein variations is essential for intervention radiologists and surgeons to reduce iatrogenic complications.

We report a previously unreported case of a pancreatic neuroendocrine tumor with a central scar mimicking a serous neoplasm. To our knowledge, this atypical imaging morphology of pancreatic neuroendocrine tumor has not been described before. Our report adds to the body literature that describes atypical imaging variants of neuroendocrine tumors and highlights that clinicians should be aware of the broad imaging characteristics of neuroendocrine tumors.

Entamoeba histolytica infection can lead to colitis, peri-colic abscess, ameboma, perforation and rarely colonic stricture. Amebic colitis is usually managed with medical management and rarely needs surgical management. We hereby report a case of colonic amebiasis, presenting as a stricture in transverse colon, mimicking malignancy, and managed successfully.

Vascular access through femoral vein is commonly used for hemodialysis treatment in patients with end-stage renal disease. Consequently, iatrogenic complications, such as femoral arteriovenous fistula, are increasingly being reported in these patients. Percutaneous endovascular management of such iatrogenic arteriovenous fistulas with stent graft placement is a minimally invasive technique with decreased morbidity and hospital stay compared with surgical repair. Here, we report a case with postcatheterization arteriovenous fistula between superficial femoral artery and femoral vein which was successfully managed with a placement of a self-expanding stent graft.

Alertness is a state of one's consciousness which has been found to affect an individual's performance. Many individuals face the problems of unsatisfactory performance when assigned a task due to lack of alertness which is evident in day-to-day lives as well. This problem becomes severe for individuals with attention deficit/hyperactivity disorder, autism and brain injuries, etc. Presently available technology-assisted training approaches are mostly performance sensitive with lesser focus on one's alertness level during a task. Motivated by this need, we have designed a computer assisted interactive system (CAIS) which has the potential to affect one's performance. Additionally, CAIS can predict one's alertness level by analyzing physiological signals e.g., from electroencephalogram during his/her interaction with tasks of varying difficulty levels offered by our system. In this research we have designed a preliminary usability study where five typically developing participants took part and the initial results are promising.

Neurenteric cyst in the thoracic cavity may produce a myriad of clinical features. We report a 7-month-old girl who presented with significant bleeding per rectum. On imaging, a mediastinal cystic structure with air-fluid levels was evident with cervico-thoracic vertebral anomalies. The cyst was excised and histopathology showed intestinal mucosal lining with heterotopic pancreatic tissue confirming the diagnosis of neurenteric cyst.

Background: Blood vessel counts using CD105 staining are more informative marker of prognosis as compared with staining by other endothelial markers. We conducted a study to compare intratumoral (IT) and peritumoral (PT) microvessel density (MVD) in head and neck squamous cell carcinoma (HNSCC) using endothelial marker CD105 and its correlation with lymph node metastasis, histological grading, and other clinicopathological parameters. Materials and Methods: Fifty cases of HNSCC with modified radical neck dissection specimens were included in the study group. Representative blocks were prepared from tumor, PT tissue, tumor margins, and all the lymph nodes. Histopathological diagnosis and other parameters were established on the routine hematoxylin and eosin stain. Immunohistochemical profile of blood vessels in IT and PT tissues was assessed by subjecting one section each from a representative block of the tumor and PT tissue to CD105 immunostain. To determine MVD, four fields with the highest MVD (hotspots) were identified. The mean values were calculated by taking an average of all the measurements. Results: No significant association was seen between MVD, IT-MVD, and PT-MVD and different age groups, male/female patients, risk factors, site of tumor, size of tumor, presence/absence of inflammation, pushing/infiltrating margin, and different stages of tumors. When compared in node positive and negative groups, a significantly higher MVD, IT-MVD, and PT-MVD was seen in association with lymph node metastasis. The comparison of MVD between PT and IT area revealed significantly higher IT-MVD (P = 0.001). Conclusion: In the study, we found a significant association of IT-MVD with lymph node metastasis and also observed CD105 as a highly specific marker for IT microvessels while PT vessels were not stained or weakly stained.