Ten-year spontaneous intracranial hypotension with acquired tonsillar descent and syringomyelia from a T3-4 ventral dural defect: importance of digital subtraction myelography localization and role of direct repair. Illustrative case. - Chan A; Baig AA; Byrne M; Butt W; Krovvidi H; Tsermoulas G; Zisakis A; Budu A (Journal of neurosurgery. Case lessons, 2026)