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We analyzed 30 gastrointestinal stromal tumors (GISTs) that were immunohistochemically weak or negative for KIT. Histologically, all 30 GISTs consisted of epithelioid tumor cells in at least a part of the tumor. The tumor cells showed different morphologies and arranged themselves in different histological patterns. In 20 of the 30 GISTs, round or oval epithelioid tumor cells often showed a less cohesive...
We have experienced an autopsy case of a 20-year-old woman with bronchiolitis obliterans, pemphigus vulgaris, and Castleman's disease. The affected bronchioles showed almost the same histology as previously described. But, the number of the lesions seemed too small to cause her death of respiratory insufficiency. We also wondered whether or not some normal routes to the peripheral pulmonary tissues...
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