Sorenson, Thomas

Abstract Cavernous malformations of the third ventricle are uncommon vascular lesions. Evidence suggests that cavernous malformations in this location might have a more aggressive natural history due to their risk of intraventricular hemorrhage and hydrocephalus. 1 The gold standard of treatment is considered to be microsurgical gross total resection of the lesion. However, with progressive improvement in endoscopic capabilities, several authors have recently advocated for the role of minimally-invasive neuroendoscopy for resecting intraventricular cavernous malformations. 2-4 In this timely intraoperative video, we demonstrate the gross total resection of a third ventricle cavernous malformation that presented with hemorrhage via a right-sided trans-frontal neuroendoscopic approach.

Abstract Intramedullary epidermoid cysts are extremely rare lesions. Preoperative diagnosis can be challenging due to non-specific imaging futures. We illustrate the case of a 32-year-old man who presented with a symptomatic intramedullary mass, which at surgery proved to be an epidermoid cyst. The spinal cord was decompressed by removing the pearl-white keratin material, although the capsule, which was tenaciously adherent to the surrounding spinal cord parenchyma, was only partially removed. In this video, we illustrate the salient surgical points for the resection of this very unusual intramedullary lesion.