A 43-year-old male with Fuhrman grade 4 ccRCC showing infiltrative growth. a: Transverse contrast-enhanced CT shows a large heterogenous mass in the left kidney. The border between the tumor and normal kidney is ill-defined, representing infiltrative tumor growth (small arrows). A large arrow and asterisk show tumor thrombus in the left renal vein and left paraaortic lymphadenopathy, respectively. b: Transverse contrast-enhanced CT below the level of Figure 3A demonstrates the inferior portion of the tumor to be necrotic with punctate and curve linear calcifications (arrows).