Priapism is a rare disease, which is the prolonged state of the penile erection without sexual desire nor satisfaction and sometimes painful and tender. Four cases of priapism are presented, the first case is thought to have occurred due to psychic or idiopathic cause, the third case idiopathic and the other two cases lesion of central nerve system and/or thrombosis.
As the conservative therapy resulted in failure in many cases, the authors are of the opinion that the early surgical intervention, e.g., aspiration and irrigation, hypotension administered by ARFONAD, ganglion blocking agent, and sapheno-corporeal anastomosis, on the first or second day, should be considered to prevent from dysfunction of penis, i.e., sexual impotence.