Intrasphenoidal Internal Carotid Artery Aneurysm: Rare Cause of Recurrent Epistaxis.

Introduction: Epistaxis is a common Otorhinolaryngological condition that is usually self-limiting and rarely requires imaging and intervention. Intrasinus Internal Carotid Artery aneurysm presenting with epistaxis is extremely rare.

Case report: We report a case of a 57- year old male presenting with recurrent episodes of epistaxis. Contrast-enhanced Computed Tomography of the Paranasal Sinuses and Magnetic Resonance Imaging were performed, which showed a focal defect in the posterolateral wall of the sphenoid sinus through which an aneurysm from the cavernous segment of the Internal Carotid artery was seen herniating into the sinus with an associated hematoma.

Conclusion: Non-traumatic Internal carotid artery Intrasphenoidal aneurysms are infrequent causes of recurrent epistaxis. They can mimic malignant or inflammatory sinus masses, which can lead to inadvertent biopsy; hence, they should be ruled out by radiological investigation to ensure timely diagnosis and management.