PMC3992443_01
MRI of abdomen, axial opposed-phase T1-weighted MR image (TR/TE, 308/3.3) shows 9 cm mass in upper pole of right kidney. India ink artifact (arrows) is present at interface of renal mass with kidney. Most AMLs contain macroscopic fat, the India ink artifact appears at all interfaces of the tumor with the kidney or at the interfaces of the fatty and nonfatty portions of the mass. Other renal masses do not contain macroscopic fat; for that reason, the India ink artifact appears at the interface of the renal mass with perinephric fat when the mass is exophytic. Thus, the diagnosis of AML is indicated when the India ink artifact is present at a renal mass-kidney interface or within a renal mass.
CEJU-66-00301-g001.jpg
PMC3992443_01_CEJU-66-00301-g001.jpg
F0001
A polycystic tumor with multiple thick-walled cysts with inhomogeneous contents and signs of fresh intracystic bleedings in some cysts was closely adherent to the liver and right lumbar muscle but was without signs of local invasion (Figure 1 and Figure 2).
MRI of abdomen, axial T2-weighted MR image (TR/TE, 4,3/2.2) shows 9 cm mass in upper pole of right kidney. The different signal of tumor and signs of bleeding product and smooth muscle/fat.
CEJU-66-00301-g002.jpg
PMC3992443_01_CEJU-66-00301-g002.jpg
F0002
A polycystic tumor with multiple thick-walled cysts with inhomogeneous contents and signs of fresh intracystic bleedings in some cysts was closely adherent to the liver and right lumbar muscle but was without signs of local invasion (Figure 1 and Figure 2).