Diagnosis of Renal Angiomyolipomas: Classic, Fat-Poor, and Epithelioid Types

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Abstract

With the increasing discovery of small renal masses with cross-sectional imaging, there has been the concomitant rise in their treatment. With the intent of early curative surgery for a presumed renal cell carcinoma, many renal masses are being resected at surgery without a confirmed diagnosis. Many of them are benign, and some are angiomyolipomas. The diagnosis of renal angiomyolipoma using imaging is, therefore, is as important as ever. Although most, if not all angiomyolipomas with abundant fat are diagnosed readily, some have too little fat to be detected with imaging. This article reviews the current classification, imaging pitfalls, and diagnosis of angiomyolipoma with an emphasis on the fat-poor types. Proper imaging technique, a thorough search for fat, and the appropriate use of percutanoeus biopsy are all needed to eliminate the unnecessary treatment of these benign neoplasms.

Original languageEnglish
Pages (from-to)37-46
Number of pages10
JournalSeminars in Ultrasound, CT and MRI
Volume38
Issue number1
DOIs
Publication statusPublished - 2017 Feb 1

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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