Epithelioid angiomyolipoma of the kidney

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Acikalin M. F. , Tel N., Oner U., Pasaoglu O., Donmez T.

INTERNATIONAL JOURNAL OF UROLOGY, vol.12, no.2, pp.204-207, 2005 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 2
  • Publication Date: 2005
  • Doi Number: 10.1111/j.1442-2042.2005.01003.x
  • Page Numbers: pp.204-207


Epithelioid angiomyolipoma is a recently recognized variant of angiomyolipoma, which is characterized by the presence of polygonal cells with densely eosinophilic cytoplasm and varying degrees of nuclear atypia. Only a relatively small number of cases of epithelioid angiomyolipoma of the kidney have been reported in the literature. We report a case of epithelioid angiomyolipoma of the kidney that occurred in a 38-year-old woman. The tumor was composed of diffuse sheets of epithelioid cells, adipocytes and only scattered thick-walled blood vessels. The epithelioid cells had pleomorphic and hyperchromatic nuclei with densely eosinophilic cytoplasm. Hemorrhage, necrotic foci and clusters of foamy macrophages were present. HMB-45, CD117 (c-kit) and CD68 were detected in the epithelioid cells. There was no expression of cytokeratin, epithelial membrane antigen or desmin. The patient showed no evidence of recurrence or metastatic disease 9 months after nephrectomy.