[Internal carotid artery aneurysms with the initial symptom of epistaxis: a case report].

The patient has complained of twice left nose bleeding. Nasal endoscope examination found bloodstain in recessus sphenoethmoidalis, while nasal sinuses MR examination showed moderate and slightly high signal in left sphenoid sinus on T₁WI and T₂WI. Then, she was underwent nasal endoscopic surgery to stop bleeding. A dark red, pulsating tissue was found above the lateral wall of the sphenoid sinus during the surgery. After the surgery, the patient did a cerebral digital vascular angiography and the diagnosis was internal carotid artery aneurysms rupture.