Posttraumatic priapism in child.

A 12-year-old-boy was admitted to our Medical Imaging Department for scrotal/perineal heamatoma and a painless partial erection after bicycle trauma. He had no other medical history. Doppler US and angiography of penile region were performed. A gray-scale US (axial view, Fig. A)) shows an irregular hypoechoic region within the echogenic cavernous tissue and cavernosal lacuna (arrows). The color Doppler US (sagittal view, Fig. B) demonstrates extravasation of blood from the lacerated cavernosal artery (arrow), in an arteriallacunar fistula with high systolic velocity and turbulent flow. The pelvic angiogram (Fig. C) shows that the fistula (arrow) in the right corpus cavernosum is fed by a right pudendal artery. Based on morphology and localization of the lesion on Doppler US and pelvic angiography, the diagnosis of posttraumatic arterial lacunar cavernous fistula was made. The patient was treated by selective embolization of the right cavernous artery, without complication. A penile Doppler evaluation after 10 days was normal and demonstrated recanalization of the embolized artery.