Evaluation of incidentally discovered kidney mass.
Normal at time of CT
Partially exophitic, enhancing mass with macroscopic fat.
Renal cell carcinoma with sequestered fat
Dx Confirmed by: Remains a differential case with AML strongly favored
Unless there is a strong clinical suspicion of malignancy, this can be followed radiographically to ensure stability.
Â» Fat, smooth muscle, blood vessels
â€¢ May bleed if >4cm
Â» Smaller lesions are not treated
â€¢ Typically enhance strongly
Â» Predominantly myxomatous AMLs may be hypovascular
â€¢ Strong association of Tuberous Sclerosis: 80% of Tuberous Sclerosis patients have mutliple AML's, usually bilateral
â€¢ Presence of fat is virtually diagnostic
Â» Case reports of Renal Cell Carcinoma with sequestered fat, make sure fat is not from renal pelvis
â€¢ No calcifications
â€¢ Variable appearance
Â» Predominance of vessel-T2 bright, strong enhancement
Â» Predominance of muscle-looks like Renal cell carcinoma
cow_pt.html :: find me