Early ureteral luminal enhancement on computed tomography in a renal trauma patient: a characteristic sign of communication between artery and collecting system.

We report the case of a 65-year-old man with blunt abdominal trauma following a fall from a three-meter-high roof. Contrast-enhanced abdominal computed tomography (CT) obtained in early phase showed intense contrast enhancement in the urinary tract as dense as artery. This finding was considered characteristic of traumatic communication between artery and collecting system. In cases of blunt abdominal trauma, contrast-enhanced CT should be obtained in the early phase to diagnose this disorder. When the diagnosis is made, prompt treatment should be initiated.