A case of massive lower gastrointestinal bleeding: superior rectal artery pseudoaneurysm.

Dear Editor, While most cases of acute lower gastrointestinal (GI) bleeding resolve spontaneously following supportive management, 10% to 15% of patients in whom bleeding persists require further diagnostic and therapeutic intervention.1 The most common causes of massive lower GI bleeding are diverticular disease and angiodysplasia.2 Massive lower GI bleeding resulting from a pseudoaneurysm is less common, but is an important consideration following a recent procedural or surgical intervention. Here we report a rare case of acute massive lower GI bleeding resulting from an iatrogenic traumatic superior rectal artery pseudoaneurysm.