Figure 4

(a) T2-weighted (TE 60 msec/TR 4.3 msec) image, coronal plane. The lesion abuts the renal pelvis and is predominantly hyperintense; some intralesional hypointense strands are present, fading out from the medial border of the tumor. (b) Heavily T2-weighted image (TE 378 msec/TE 4.3 msec). The tumor is less intense than the content of the renal pelvis; the intralesional hypointense strands are seen more clearly.