Abstract Breast angiosarcoma is a rare malignancy of endothelial origin that can be categorized as primary (PAS) or secondary (SAS) based on etiology. Primary typically affects younger women with no known risk factors, whereas SAS the breast develops in older who have undergone cancer treatment. There are two types SAS, one setting chronic lymphedema and radiation-associated neoplasm after brea...

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Background Tsutsugamushi disease is an acute, febrile, infectious disease caused by Orientia tsutsugamushi. Several studies investigating the histopathologic findings of eschars in tsutsugamushi disease reported leukocytoclastic vasculitis and neutrophil infiltration as the major findings. However, these findings may result from secondary changes following tissue necrosis. The histopathologic f...

BACKGROUND AND AIMS Well-differentiated chondrosarcoma and enchondroma are similar in histopathologic aspects; therefore, special methods should be used to make a distinction between these benign and malignant tumors. The aim of this study was to evaluate the efficacy of a histopathologic method in the long-term follow-up for differentiating these lesions. MATERIALS AND METHODS The medical re...

Only three primary malignant melanomas have been identified among large series of tracheal resections. Pertinent clinical and histopathologic features of these rare malignancies, however, have rarely been presented. We present the case of a young woman who underwent tracheal resection for a primary malignant melanoma with clinical and histopathologic verification.

Most gallbladder carcinomas are adenocarcinomas, of which mucinous carcinoma (MC) is a rare pathologic subtype. Signet ring cells are seldom found in MCs. We report an extremely rare case of gallbladder MC with signet ring cells. This is the first radiological case report about this rare type of histologic entity with detailed discussion of imaging findings in the English literature. In additio...

Neurocytoma We read with interest the case report by Yang et al. This was a nice presentation of 3 cases with extraventricular neurocytoma, which is a relatively rare tumor. The authors presented clinical, histopathologic, and immunohistochemical findings, along with the imaging characteristics. All tumors in their report showed marked enhancement. They concluded that this entity should be cons...