[Angiomyolipoma: the role of puncture-aspiration cytodiagnosis]

Angiomyolipomas (AML) of the kidney are benign tumors easily identified on image studies due to their fat content, but differential diagnosis with renal cell carcinoma may be sometimes difficult. A case of AML with atypical CT feature that were cleared by the characteristic findings on aspiration biopsy cytology is described, and the recent literature concerning controversies of image diagnosis and usefulness of aspiration biopsy cytology of renal AML is discussed.