Renal angiomyolipoma


  • A 27 years old lady
  • No known medical illness
  • Presented with abdominal pain
Scanogram prior to CT scan
CT scan abdomen soft tissue window; plain scan (upper rows) and contrasted CT (lower rows)

CT scan findings:

  • Huge mass lesion at both renal region
  • Conforming to shape and configuration of kidneys
  • Presence of fat components within
  • Dystrophic calcifications (yellow arrows) are also seen within the mass lesion
  • There is no contrast extravasation to suggest active haemorrhage
  • No hydronephrosis bilaterally
  • Displacement and compression effect to surrounding structures however clear plane of demarcation is seen

Diagnosis: Bilateral renal angiomyolipomas.


  • Angiomyolipoma (AML) is the most common benign solid renal tumor
  • Most AMLs contain fat that is clearly visible on CT and MR images, so these tumors can be easily diagnosed without biopsy or surgery
  • The majority of angiomyolipomas are sporadic (80%) and are typically identified in adults
  • It is more common in females
  • The tumour have the risk of rupture with bleeding or secondary damage/destruction of surrounding structures as they grow.
Author: radhianahassan