会陰部に発生し診断に苦慮した近位型類上皮肉腫の1例

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  • A CASE OF PROXIMAL-TYPE EPITHELIOID SARCOMA GENERATED FROM PERINEUM WITH DIFFICULTY IN PREOPERATIVE DIAGNOSIS

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We recently experienced an extremely rare case of proximal-type epithelioid sarcoma in a 36-year-old man.<br>The patient was admitted to the hospital because of a growing superficial nodule in the perineum in October, 2002. Despite various examinations, preoperative definite diagnosis was not made. He received surgical excision of the tumor in November, 2002. Histopathological examinations showed central necrosis with findings compatible with epithelioid sarcoma. In immunohistochemical examination, the cell stained positively for anti-cytokeratin, anti-CD34, anti-vimentin, anti-EMA, and anti-E-cadherin, but not for anti-neurofilament, anti-desmin, and anti-GFAP.<br>Postoperative course was uneventful, but he died of respiratory failure resulting from multiple lung metastases 1 month after the surgery.

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