Incidental Monotypic (Fat-Poor) Renal Angiomyolipoma Diagnosed by Core Needle Biopsy
Figure 1
(a–d) Axial MR images of the left kidney, T1-weighted in-phase (a) T1-weighted opposed phase (b) T2-weighted fat-saturated (c), and T1-weighted, contrast-enhanced fat-saturated (d). The left renal mass is isointense in T1-weighted imaging without evidence of fatty components (a, b); the small hypointense spots in fat-saturated T2-weighted imaging are vessels (c). The mass is hypointense in T1-weighted imaging after i.v. contrast media (d); solley centrally there are KM-enhancing foci representing vessels (d).
