2025 Poster Presentations
P384: PETROUS TENTORIAL ARTERIOVENOUS MALFORMATION RESECTED VIA EXPANDED RETROSIGMOID APPROACH
Jeffrey M Breton, MD1; Ehsan P Dowlati, MD2; Samir Sur, MD1; 1MedStar Georgetown University Hospital; 2Northwell Health Neurosurgery
A 45-year-old male experienced acute-onset severe occipital headache. He was found to have a left petrous tentorial arteriovenous malformation (Spetzler-Martin Grade III). He underwent preoperative Onyx embolization of a left superior cerebellar artery feeder and then microsurgical resection of the AVM via left-sided retrosigmoid craniotomy. An anterior inferior cerebellar artery (AICA) aneurysm ruptured intraoperatively and was clipped. Postoperatively, he had intact strength, with transient gait imbalance and L facial droop, and persistent L hearing loss.