Isolated Oculomotor Nerve Palsy Caused by Cavernous Sinus Dural Arteriovenous Fistula: Case Report

Isolated oculomotor palsy is a rare symptom seen in patients with many, different neurological disorders (1, 2). It is often the first or even the sole manifestation of a pathology that potentially affects the nervous system. When older patients are presented with isolated ocular motor nerve palsy, without congestive ocular features, this condition is easily misdiagnosed as idiopathic, ischemic mononeuropathy or aneurysm. While isolated ocular motor nerve palsy, presenting as the only manifestation of cavernous dural arteriovenous fistula (DAVF), has occasionally been reported (3-5), we report a case of cavernous DAVF presenting with unusual, isolated oculomotor nerve palsy and treated by transvenous coil embolization.