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The Korean Journal of Pathology 2000;34(11): 953-956.
Epithelioid Angiomyolipoma of the Kidney: A case report.
You Kyung Kim, Jong Sil Lee, Ky Hyun Chung, Sun Hoo Park, Gyung Hyuck Ko
1Departments of Pathology, Gyeongsang National University College of Medicine, Chinju 660-751, Korea.
2Departments of Urology, Gyeongsang National University College of Medicine, Chinju 660-751, Korea.
ABSTRACT
Angiomyolipoma is considered by many authors to be a hamartoma, occurring in a sporadic form or in association with tuberous sclerosis. This lesion consists of thick walled blood vessels, smooth muscle, and mature adipose tissue in varying amounts. We have experienced a case of the angiomyolipoma composed of monotypic epithelioid cells. The patient was a 69-year-old female. Clinically, there was no evidence of tuberous sclerosis. Microscopically, the tumor was composed of polygonal cells with abundant eosinophilic granular or clear cytoplasm, pleomorphic nuclei, prominent nucleoli, and multinucleated giant cells. The tumor cells showed positive reaction for HMB45, CD68, smooth muscle actin, and S-100, and negative reaction for epithelial membrane antigen, cytokeratin, vimentin, desmin, CD34, estrogen receptor, and progesterone receptor. Ultrastructual analysis showed the presence of glycogen, mitochondria, and other microorganelles in neoplastic cells. Melanosome or premelanosome was not identified.
Key Words: Epithelioid angiomyolipoma; Kidney