Priapism

	Non-ischemic (high-flow)	Ischemic (low-flow)
Physical Exam	Typically painless, not fully tumescent	Painful, fully tumescent with corpus cavernosa rigidity without involvement of corpus spongiosum and glans penis
Aetiology	High-flow priapism is extremely rare and most commonly associated with antecedent trauma including blunt trauma, or resulting from needle injury of the cavernosal artery.	Low-flow priapism is caused by impaired relaxation and/or paralysis of cavernosal smooth muscle and in sickle-cell disease
Management	NOT Emergency	Emergency