Angiomyolipoma with epithelial cyst (AMLEC): A rare variant of fat poor angiomyolipoma mimicking malignant cystic mass on MR imaging

ACAR T., HARMAN M. , ŞEN S. , Kumbaraci B. , ELMAS N. Z.

DIAGNOSTIC AND INTERVENTIONAL IMAGING, vol.96, no.11, pp.1195-1198, 2015 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 96 Issue: 11
  • Publication Date: 2015
  • Doi Number: 10.1016/j.diii.2015.03.005
  • Page Numbers: pp.1195-1198


Angiomyolipoma (AML) of the kidney is the most common benign neoplasm encountered in daily clinical practice. Typical AMLs comprise three elements: mature adipose tissue, blood vessels, and smooth muscle. Since classic AMLs contain considerable amount of adipose tissue, they are easily recognized on computed tomography (CT) and magnetic resonance imaging (MRI) [1]. On the other hand, some AMLs comprise too little fat to be detected with unenhanced CT. These lesions are called "fat poor AMLs" that may be misdiagnosed as renal cell carcinoma (RCC) on cross sectional imaging [2, 3]. Angiomyolipoma with epithelial cysts (AMLEC) is an extremely rare subtype of fat poor AML, which contains epithelial-lined cysts. According to best of our knowledge imaging findings of AMLEC is very scarce and only a total of 18 cases have been reported so far [4-8]. Herein, we aimed to report the MRI features of AMLEC that resembles Bosniak category III lesion on MRI and emphasize the potential role of dual gradient-echo imaging in detecting small amount of fat in AMLEC.