Ureteric bud remnant with renal agenesis

Ureteric bud remnant with renal agenesis is a rare disorder when urogenic system develops. Because of no obvious symptoms, it is usually explored incidentally.

A 41-year-old male presented with intermittent discharge of turbid fluid from his scrotum. A pinhole was noted in his left scrotum, and an infectious sinus or fistula was impressed. After serial studies, computed tomography revealed agenesis of his left kidney and a cystic lesion over his left scrotum. He underwent resection of the infectious sinus. Near the tail of the sinus, a connection was found to a channel-like structure. Contrast medium was injected which showed a blind end of this channel-like structure. The tube was ligated, and the cut end was sent for surgical pathology, which confirmed a left ureteric bud remnant.

Complete imaging studies make this diagnosis clearly.