What are etiologies of ischemic priapism?

1/Hematologic dyscrasias are a major risk factor for ischemic priapism( Sickle Cell Disease , thalassemia, granulocytic leukemia, myeloid leukemia, lymphocytic leukemia,Hemodialysis 2/Iatrogenic :complication of the intracavernous vasoactive medications ( 0.5% to 35%) Oral PDE5 ( sildenafil ,…) Rare case report