Small renal angiomyolipoma

Case contributed by Dr Bruno Di Muzio


Small echogenic nodule in the left kidney.

Patient Data

Age: 55

CT KUB (selected images)

The CT scan shows that the ultrasound finding (no images available) corresponds to a small lipid content nodule in the left kidney.

Case Discussion

Renal angiomyolipomas are benign renal neoplasm composed of vascular, smooth muscle and fat elements. Angiomyolipomas are often found incidentally when the kidneys are imaged for other reasons, such in this case (ultrasound). Most lesions involve the cortex and demonstrate macroscopic fat (< - 20HU). When small, volume averaging may make differentiation from a small cyst difficult. It is important to realise that a proportion of angiomyolipomas are fat-poor. 

Calcification is rare.

The diagnosis can be confirmed by imaging characteristics as such in this case. 

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Case information

rID: 19230
Published: 18th Aug 2012
Last edited: 16th Jul 2018
System: Urogenital
Inclusion in quiz mode: Included

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