Figure 6b. Surgically confirmed secondary left varicocele in a 60-year-old man. (a) Contrast material-enhanced transverse CT scan and (b) transverse US scan of the left testis (t) reveal large left renal cell carcinoma invading the left renal vein (arrow in a), resulting in secondary varicocele (arrow in b). (Image courtesy of Patrick Fultz, MD, Rochester, NY.)