Spontaneous perirenal hemorrhage due to ruptured renal arteriovenous malformation: A case report

Spontaneous perirenal hemorrhage is bleeding in perirenal space with no associated trauma or iatrogenic manipulation. It is a rare condition, prevalence of renal arteriovenous malformation (AVMs) was <0,04%. A 51-year-old man presented with a dull pain at right flank for 4 days before admission. Physical examination revealed tenderness in the right flank area. An abdominal CT showed large right perirenal hematoma. The patient underwent surgical exploration, and an active source of bleeding was found at the posterior aspect of the right kidney. Pathology showed evidence of ruptured arteriovenous malformation. Open surgery was performed due to the large hematoma with pain.