Characteristic Enhancement Patterns of Renal Epithelioid Angiomyolipoma: a case report and literature review

We present a case of renal epithelioid angiomyolipoma in a 42-year-old woman with diabetic nephropathy for two years. Ultrasonography revealed a right renal mass in the patient. Further imaging could not confirm the nature of the mass, which grew noticeably over the course of 4 months. The mass was treated with right radical nephrectomy and diagnosed as renal epithelioid angiomyolipoma. Characteristic enhancement patterns of renal epithelioid angiomyolipoma were observed and supported by a review of the literature. J Radiol Sci 2015; 40: 51-56 Correspondence Author to: Nan-Han Lu Department of Radiology, E-DA Hospital/I-Shou University, Kaohsiung, Taiwan No. 1, Yi-Da Road, Yan-Chao, Kaohsiung 824, Taiwan 04_RAG_1701.indd 51 2015/8/27 上午 09:39:16 Enhancement patterns of renal epithelioid angiomyolipoma 52 J Radiol Sci June 2015 Vol.40 No.2 RCC still could not be excluded, right radical nephrectomy was performed. Histopathology with immunohistochemical staining revealed that the mass was predominantly composed of large epithelioid cells. Most cells stained intensely for HMB-45 (Fig. 4). According to these findings, the tumor was confirmed to be an EAML.