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요관에 발생한 평활근육종 분화를 보인 육종양 요로상피암
임광일(Kwang Il Yim),이용석(Young Seok Lee),구영미(Young Mi Ku),신옥란(Ok Ran Shin) 대한비뇨기종양학회 2010 대한비뇨기종양학회지 Vol.8 No.2
Sarcomatoid urothelial carcinoma is a rare malignant tumor with a poor prognosis. We experienced a case of sarcomatoid urothelial carcinoma of the ureter that protruding into the urinary bladder in 55-year old woman. She underwent total nephrouretectomy with bladder cuff resection. Pathologically, the mass consisted of high grade urothelial cell carcinoma component and sarcomatoid cell component and we could find transitional zone of two cell groups. In immunohistochemical study, sarcomatoid cell group showed positive reactions for smooth muscle actin and vimentin. Therefore sarcomatoid cell component showed leiomyosarcomatous differentiation, so we can diagnosed this tumor as sarcomatoid urothelial carcinoma with heterologous elements of leiomyosarcoma.