title: Solitary fibrous tumor of the kidney: a case report.
abstract: Solitary fibrous tumor is a spindle cell neoplasm mostly originating from pleura; however, it has also recently been reported to be extrapleural. A 57-year-old man presented with left lumbal pain. Ultrasonography and computed tomography showed a cystic lesion of 14 × 11 cm with solid areas and septations in middle and lower poles of the left kidney. Radical nephrectomy was performed. Immunohistochemical studies showed strong reactions with CD34 and CD99. A nuclear positivity with Ki-67 was observed in less than 1% of cells. Despite repeated stainings with vimentin, no clear tumor evaluation could be made due to artifacts. The tumor was negative with Bcl-2, desmin, HMB-45, S100, FVIII, and CD31. Histopathological and molecular studies made the diagnosis of a solitary fibrous tumor. The patient is now currently free of disease at the 26th month of followup.
authors: Department of Urology, Erciyes University Medical Faculty, 38039 Kayseri, Turkey.
authors: Abdullah
authors: A
authors: Demirtaş
authors: Volkan
authors: V
authors: Sabur
authors: Hülya
authors: H
authors: Akgün
authors: Emre Can
authors: EC
authors: Akınsal
authors: Deniz
authors: D
authors: Demirci
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