We present a case of high-flow priapism due to perineal trauma and subsequent arteriocavernosal fistula, which was diagnosed by sonography. Selective arterial embolization led to complete detumescence without compromising the patient's erectile function. Color Doppler sonography is an appropriate diagnostic tool to diagnose arteriocavernosal fistula. Selective arterial embolization is a safe and effective therapeutic option.
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