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Korean J Urol Oncol > Volume 4(2); 2006 > Article
The Korean Journal of Urological Oncology 2006;4(2): 91-94.
신세포암으로 오인된 상피모양 신혈관근지방종
하유신, 이준하, 이광배, 최항원, 조대행, 이충범
가톨릭대학교 의과대학 비뇨기과학교실
Epithelioid Angiomyolipoma of the Kidney Misdiagnosed as a Renal Cell Carcinoma
U-Syn Ha , Jun Ha Lee , Kwang Bae Lee , Hang Won Choi , Dae Haeng Cho , Choong Bum Lee
Department of Urology, The Catholic University of Korea College of Medicine, Seoul, Korea
Published online: December 30, 2006.
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. We report a case of renal epithelioid angiomyolipoma misdiagnosed as a renal cell carcinoma that occurred in a 46-year-old woman. Pathologically, the tumor was composed of diffuse sheets of epithelioid cells, which had pleomorphic and hyperchromatic nuclei with densely eosinophilic cytoplasm and were positive in HMB-45 and smooth muscle actin. There was no expression of cytokeratin, epithelial membrane antigen, vimentin, myoglobin, S-100 protein, estrogen receptor and progesterone receptor. After radical nephrectomy, the patient showed no evidence of recurrence or metastasis until now. (Korean J Uro-Oncol 2006;4:91-94)
Key Words: Epithelioid cell; Angiomyolipoma; Kidney
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