BACKGROUND Burkitt's lymphoma (BL) is an uncommon cause of non-Hodgkin lymphoma in adults and accounts for only 0.1-0.5% of all malignant tumors of the colon and rectum. Very few cases of rectosigmoid and stomach BL have been reported in adults. CASE REPORT A 51-year-old Hispanic woman presented with a 1-month history of hematochezia, associated with a foreign-body sensation in the rectum and...

BACKGROUND Cellular angiofibroma represents a newly described, site specific tumor. Histologically, CAF is a benign mesenchymal neoplasm characterized by two principal components: bland spindle cells and prominent small to medium-sized vessels with mural hyalinization. The indolent nature of the lesion is underscored by the uniformity of its constituent stromal cells, and their lack of nuclear ...

EMBOLIC phenomena occur with such frequency in the course of bacterial endocarditis as to constitute a cardinal diagnostic feature of this disease. However, it has been noted that the resultant infarcts are less often septic than would be expected if the emboli originated from the infected valvular vegetations.' A previous study of this apparent paradox showed that it is the nonbacterial thromb...

Case Report A 64-year-old white man, blind since birth, considered himself well until March 1960. Because of progressive weakness, shortness of breath upon effort, and swelling of the ankles, he entered Episcopal Hospital on June 13, 1960. Cardiac therapy was intensified and left thoracentesis was done on several occasions. The fluid was serosanguineous in character. Pleural biopsy, with a Vim-...

A hallmark of early diabetic retinopathy is the selective loss of the retinal mural cells (pericytes) from vessels. Using antibodies prepared against purified human placental aldose reductase, the presence of the enzyme aldose reductase can be demonstrated immunohistochemically in the cytoplasm of retinal mural cells of trypsin-digested human retinal vessels. This enzyme, which reduces various ...

A one-year-old male Beagle dog showed dermatitis, alopecia and scales. Examination of the affected dog revealed generalized alopecia, patchy erythema, and superficial erosions with histological evidence of mural folliculitis. External tests for parasites in scraped skin samples were negative. However, fungal culture tests and polymerase chain reaction revealed the existence of Candida in the le...

The fatty acid composition of untreated alloxan-diabetic and normal rat retinal tissue was compared and the relative abundance of endothelial and mural cells in the retinal capillaries was estimated. Arachidonate and docosahexaenoate were decreased in diabetic retinal tissue; linoleate was increased. The changes observed indicate that insulin is required to maintain a normal rate of polyenoic f...

Intraductal papillary-mucinous neoplasm (IPMN) of the pancreas presents in various histopathological stages from benign to malignant lesions. The differentiation between benign and malignant IPMN is important in order to determine the treatment of the patients. However, pre-operative differentiation remains difficult. The aim of this study was to assess the utility of 2-[18F] fluoro-2-deoxy-D-g...

Primary retroperitoneal mucinous tumors are rare neoplasms and almost exclusively seen in women. In this case report we present two cases of this entity with their clinicopathologic features. The first patient was a 32 years old unmarried woman presented with abdominal pain. Ultrasound imaging demonstrated a solid and thick walled ovarian mass m. 105* 70*80 mm. At laparotomy a large retroperito...