Einstein Tejada

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Meckel's diverticulum is a vestigial remnant of the omphalomesenteric duct, which is rarely affected by neoplasia. The authors report the first case of malignant melanoma in Meckel's diverticulum in a middle-aged man without skin or ocular lesions. Five other Meckel's diverticuli were evaluated histologically and by immunoperoxidase technics for neural(More)
We report a case of a simple cyst in the upper pole and connected to the mediastinum testis at the rete testis. The cyst appeared to arise from a dilated rete duct, and it was spherical, smooth-walled and filled with clear fluid. The epithelium was lined with a single layer of cuboidal or flattened cells, with no evidence of squamous differentiation.
A 43-year-old man with a history and symptomatology of hereditary spherocytosis underwent splenectomy and cholecystectomy for treatment of his underlying disease and of cholelithiasis. The removed gallbladder showed a serosal encapsulated nodule, supported by a short mesentery, measuring 11 x 6 x 4 mm, that histologically was an ectopic or heterotopic(More)
Pain and pulsation are common presenting features of aortic aneurysms. Massive hematemasis and ureteral obstruction represent rare clinical presentations. This report describes a patient with massive hematemesis in whom a thoracic aneurysm ruptured into the esophagus, and a second patient in whom a large abdominal aortic aneurysm caused bilateral ureteral(More)
Primary sarcomas of the aorta are rare vascular tumors. About 26 cases have been reported between 1973 and 1989. They are seldom diagnosed antemortem. The present report describes a patient with a myxoid malignant fibrous histiocytoma arising in the intima of the lower thoracic aorta, which was diagnosed premortem in metastatic peripheral emboli. The(More)
This study aimed to test whether the digestive and metabolic characteristics of pseudo ruminants provide superior ability to utilise low-quality diets compared to true ruminants. A total of 18 mature, non-pregnant, non-lactating female animals, including six llamas (Lama glama), six Danish Landrace goats and six Shropshire sheep, were used in a crossover(More)
Prostatic stromal hyperplasia with bizarre nuclei is an uncommon variant of nodular hyperplasia that may be confused with mesenchymal malignancy but that can usually be distinguished by the degenerative character of the nuclear changes, absent to negligible mitotic rate, and relatively sparse cellularity. We report a case in a 73-year-old man and review six(More)
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