Re: Radiological classification of renal angiomyolipomas based on 127 tumors.

Dear Editor, We read the article by Dr. Prando with interest (1). He evaluated the radiological findings of 127 angiomyolipomas (AML) and defined 4 categories depending on the fat content of the tumors. The author defined pattern-I as small (< 1.5 cm), intrarenal, homogenous and predominantly fatty lesions and proposed that these lesions tend to become more heterogenous (with increasing amounts of non-fatty soft tissue, intratumoral vessels or hematoma) if they grow. However, we would like to report a case of a large ruptured renal AML with very high amounts of fatty tissue. She was a 46-year-old woman presented to emergency service because of a sudden occurence of left upper abdominal pain. A plain abdominal film was negative and abdominal ultrasonography showed highly echogenic lesion in the lower pole of left kidney surrounded by a hypoechogenic mass. Enhanced computed tomography (CT) of the abdomen con-