Kidney CT Appearances
Angiomyolipoma (AML) CT Findings
- May be difficult to differentiate from RCC when fat is minimal
- AML has visible fat density with extent variable
- Hypoattenuating area <-10 HU
- May contain small intratumoral aneurysm
- Thin CT sections needed for diagnosis of tumors with minimal fat
Other Information About Angiomyolipoma
Etiology:
- May be hereditary or sporadic
- Lymphangioleiomyomatosis
- Tuberous sclerosis
Epidemiology:
- Female to male ratio is 4:1
- Can occur at any age
Presentation:
- Mostly asymptomatic
- Palpable mass when large
- Anemia
- Flank pain
- Hematuria
- UTI
Prognosis:
- Mostly benign
- Renal AMLs causing symptoms may require treatment or surgery
- Over 5cm can spontaneously bleed
Related Pearls: Renal Angiomyolipoma
Related Lectures:
MDCT/CTA Evaluation of the Suspected Renal Mass: Key Differential Clues - Part 1
MDCT/CTA Evaluation of the Suspected Renal Mass: Key Differential Diagnosis Points - Part 1