[Scintigraphy showing bladder in the scrotum by coincidence].

Inguinoscrotal bladder herniation (ISBH) is rare and often asymptomatic, but complications such as renal failure can occur. We present a case of a 70-year-old man with hydrocele. A bone scan showed tracer accumulation in the left scrotum, and a SPECT/CT while urinating revealed that most of the bladder was in the scrotum. Renal function was normal and a cystoscopy was done. The patient did not want surgery. Hydrocele has not been described as the primary cause of referral in patients with ISBH. It is important to diagnose ISBH because of the risk of complications and risk of underlying malignancy.