Sarcomatoid carcinoma of the stomach. A report of three cases with immunohistochemical and ultrastructural observations

作者: Susan S. Robey-Cafferty , David J. Grignon , Jae Y. Ro , Karen R. Cleary , Alberto G. Ayala

DOI: 10.1002/1097-0142(19900401)65:7<1601::AID-CNCR2820650725>3.0.CO;2-N

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摘要: The authors report three cases of sarcomatoid carcinoma arising in the stomach. This uncommon tumor is characterized by a mixture malignant epithelial and spindle cell elements. All tumors were large (average diameter, 5 cm) infiltrated deep into stomach wall. Two had polypoid configuration; third was ulcerated endophytic. Intestinal metaplasia present adjacent to all cases, with dysplasia two. Immunohistochemical studies showed positivity for cytokeratin, carcinoembryonic antigen, membrane antigen component tumors, Leu-M1 positive one. components contained vimentin, 2, also desmin. focal cytokeratin cells immediately component. Ultrastructurally, two composed undifferentiated without specific or mesenchymal features. occasional features myofibroblasts.

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