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Dissecting Aneurysm of the Basilar Artery—A Rare Complication of Bacterial Meningitis in a Postoperative Case of CSF Rhinorrhea

Basilar artery dissections are rare events which present with subarachnoid hemorrhage (SAH), brain ischemia, and usually have a fatal outcome. Few case reports of mycotic dissections are published in literature. We report a case of a young male who underwent surgical treatment for post-traumatic CSF rhinorrhea. He presented 3 years later with signs of bacterial meningitis. During medical management with antibiotic therapy, he developed basilar artery aneurysm in a span of 2 days, had subarachnoid hemorrhage and deteriorated. CSF culture grew alpha hemolytic streptococci. Despite medical management, he developed brain stem infarcts and succumbed. This report highlights a rare fatal complication of mycotic dissecting aneurysm of the basilar artery following meningitis, which developed acutely in hospital, while on treatment. Antibiotic therapy had not altered the course of disease. It is advisable to investigate for presence of ruptured mycotic aneurysms or dissection in cases of bacterial meningitis leading to SAH.