Solitary fibrous tumor of the kidney - a report of two cases with review of literature

Sun A. Kim, Jung Eun Hwang, Jae Y. Ro, Kyung Ja Cho, Cheryn Song, Mi Jung Kim

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2 Scopus citations


Solitary fibrous tumor (SFT) is a benign mesenchymal neoplasm usually occurring in the pleura. Kidney is one of the rarest sites for SFT. We report here on two cases of renal SFT found in 30-year-old and 33-year-old men with review of the literatures. Both cases manifested as well-enhanced solid masses in kidney and radical nephrectomies were done. The tumors consisted of bland-looking spindle cells arranged in short, ill-defined fascicles and storiform pattern with characteristic hemangiopericytoma-like blood vessels. The tumor cells were strongly positive for CD34 and CD99, focally positive for bcl-2, and negative for cytokeratin and human melanoma black-45 on immunohistochemical stainings. Possibility of SFT should be considered in the differential diagnosis of a renal mass which consists of benign-looking spindle cells and hemangiopericytomatous blood vessels. Immunohistochemical staining for CD34 is essential to confirm the renal solitary fibrous tumor.

Original languageEnglish (US)
Pages (from-to)420-425
Number of pages6
JournalKorean Journal of Pathology
Issue number4
StatePublished - Aug 2010


  • Immunohistochemistry
  • Kidney
  • Solitary fibrous tumor

ASJC Scopus subject areas

  • Pathology and Forensic Medicine


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