%0 Case Reports %T Multiple hereditary exostoses: A pseudoaneurysm masquerading as tumor. %A Trivedi H %A Link TM %A O'Donnell RJ %A Horvai AE %A Motamedi D %J J Radiol Case Rep %V 10 %N 8 %D Aug 2016 %M 27761193 暂无%R 10.3941/jrcr.v10i8.2849 %X Multiple hereditary exostoses is an autosomal dominant condition characterized by numerous benign osteochondromas. Complications are rare and can include deformity, growth abnormality, fracture, adventitial bursa formation, local mass effect on a nerve, malignant degeneration, and vascular complications including stenosis, occlusion, arteriovenous fistula, and pseudoaneurysm. We present a case of multiple hereditary exostoses leading to a deep femoral artery pseudoaneurysm in the proximal medial thigh with subsequent rupture and hematoma, masquerading as tumor.