Extracortical renal angiomyolipoma

Case contributed by Dr Balint Botz


Screening US.

Patient Data

Age: 80 years
Gender: Female

A circumscribed, largely extracortical, markedly echogenic mass is visible in the lower pole of the left kidney.

Case Discussion

The lesion was known from prior imaging, and its distinct, homogeneously echogenic appearance and lack of change over more than a decade is virtually pathognomonic for renal angiomyolipoma. While even tiny angiomyolipomas within the cortex are diagnosed with ease, lesions that are predominantly extracortical can be overlooked due to the lack of contrast between the tumor and the perirenal fat.

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Case information

rID: 79168
Published: 30th Jun 2020
Last edited: 3rd Jul 2020
System: Urogenital
Inclusion in quiz mode: Included
Institution: University of Pécs

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