Idiopathic inferior mesenteric arteriovenous fistula: a rare cause of pulsatile abdominal mass.

Inferior mesenteric arteriovenous fistula (AVF) is an extremely rare vascular abnormality which may be idiopathic or secondary to previous trauma or surgery, and it may result in portal hypertension or ischemic colitis if left untreated. Imaging can help accurately diagnose visceral AVFs and create a vascular map to display the feeding artery and draining vein before the surgery; however, multidetector computed tomography (MDCT) angiography of inferior mesenteric AVF is not well documented in the literature. In this article, the authors report a case of inferior mesenteric AVF in a 48-year-old woman evaluated for left-sided abdominal pain and diagnosed preoperatively by MDCT angiography.

Sphenoclival intraosseous lipoma in skull base.

Intraosseous lipoma is a rare benign tumor, mostly occurring in lower limb especially in os calcis and the metaphyses of long bones. Intraosseous lipoma of the skull is even rarer, with 12 cases having been reported to involve the sphenoid bone in the literature. We present the third reported case of sphenoclival intraosseous lipoma in a 43-year-old man with headache, hyperprolactinemia and visual disturbance.