“…The “ultrasound-guided” percutaneous thrombin injection showed to be effective in an 8-year old child, with post-trauma priapism like our patient. 4 The American Urological Association recommends an initial period of observation; should the penile intumescence persist, an arteriography should be performed and, if possible, embolization of the arterial shunt, and, as last resource, surgical intervention for ligation of the fistula. 1 …”