Activity Within an Extraperitoneal Ureteral Herniation Detected on Bone Scan, Associated With a Partially Duplicated Collecting System.

A 64-year-old man with history of renal stones and prostate cancer presented for evaluation of osseous metastatic disease due to elevated prostate-specific antigen (13.7 ng/mL). A Tc-labeled bone scan demonstrated unusual linear uptake projecting over the lower pelvis extending into the scrotum. Follow-up CT confirmed a rare case of inguinoscrotal extraperitoneal herniation of the ureter associated with a partially duplicated left renal collecting system. The left-sided inguinoscrotal uptake was within the herniated ureter, potentially mimicking disease within the pelvis.