central nervous system atypical teratoid/rhabdoid tumor during infancy is a rare, highly aggressive tumor most commonly seen in the cerebellar area. herein we describe the case of a 4-month-old baby who presented with convulsions. pathologic examination of her cerebellar mass showed an atypical teratoid/rhabdoid tumor. the patient died 5 days after surgery despite complete excision of the mass ...

BACKGROUND Laparoscopic sleeve gastrectomy (LSG) is a common surgical therapeutic option for obese patients, with debate about the value of routine histopathologic examination of LSG specimens. We assessed the following: prevalence of different histopathologic changes in LSG specimens, risk factors associated with premalignant and with frequent histopathologic changes, and whether routine histo...

Phaeochromocytoma is a term used for catecholamine secreting tumors that arise from chromaffin cells of sympathetic paraganglia. The new World Health Organisation (WHO) classification of endocrine tumors has recommended to reserve the term phaeochromocytoma for intraadrenal tumors only and the others are defined as sympathetic or parasympathetic paragangliomas, further categorised by site. Alth...

Six hundred thirty cases of thymomas were evaluated to determine morphologic heterogeneity. The thymomas were grouped in 4 categories using previous terminology. Stratification according to the number of sections available for examination revealed a marked difference in distribution by histopathologic type. A cutoff number of 5 sections appears to provide a difference in subgrouping these tumor...

INTRODUCTION Lupus vulgaris is the most common form of cutaneous tuberculosis. It may easily be overlooked if a proper differential diagnosis is omitted. CASE PRESENTATION A 46-year-old Turkish woman presented with a 42-year history of erythamatous plaque on her left arm. Ziehl-Neelsen and periodic acid-Schiff stains did not show any acid-fast bacilli. Culture from a biopsy specimen was negat...

PURPOSE To identify mucosa-associated lymphoid tissue (MALT) type lymphoma in conjunctival infiltrates. METHODS Clinical, histopathologic, immunophenotypic, and immunogenotypic studies were performed on 14 patients with conjunctival lymphoid infiltrates. Surgical biopsy specimens were subjected to histopathologic, immunohistochemical, and gene rearrangement analysis. RESULTS Thirteen of the...