Fig. 12
A 46-year-old female with a fat poor right renal angiomyolipoma, biopsy was performed to confirm after MRI. a Axial T1-weighted MR image shows a hypointense fat poor AML (arrow). b Axial opposed phase T1-weighted MR image shows the AML does not contain any micro- or macroscopic fat (arrow). c Axial T2-weighted image shows the fat poor AML is hypointense (arrow). d Axial post contrast corticomedullary phase T1-weighted MR image shows hyperenhancement of the AML (arrow), allowing differentiation from a papillary RCC