J Korean Soc Radiol.  2022 Sep;83(5):1109-1115. 10.3348/jksr.2021.0172.

Renal Epithelioid Angiomyolipoma with Epithelial Cysts Mimicking Cystic Renal Cell Carcinoma: A Case Report of Combination of Two Rare Entities

• Lee SH
• Lee JS
• Kim JJ
• Ko SY
• Lee KR
• Hwang IK
• Hyun CL

• KMID: 2534051
• DOI: http://doi.org/10.3348/jksr.2021.0172

Abstract

Renal angiomyolipomas (AMLs) are typically solid tumors, but there have been few reports of a rare cystic variant of AML. AML with epithelial cysts, where the epithelial cyst has a cuboidal epithelial lining, account for the majority of them. Next, epithelioid AML (EAML) with cystic changes due to hemorrhage and necrosis, which is composed of epithelioid cells with abundant eosinophilic cytoplasm, have also been reported. These rare cystic types of AML can be mistaken for other cystic tumors, such as cystic renal cell carcinoma, in preoperative imaging. We report the imaging findings of a rare case of EAML with epithelial cysts.

Keyword

Angiomyolipoma; Kidney; Neoplasms; Computed Tomography; X-Ray; Magnetic Resonance Imaging