Staged approach to managing aggressive clival lesions extending into occipital condyles illustrated by a rare urothelial carcinoma metastasis: illustrative case

This approach of upfront diagnosis and stabilization allowed identification of a rare and unexpected differential diagnosis prior to coordinating maximal resection across three additional staged surgeries in a patient thought to have a clival chordoma extending to the bilateral occipital condyles. https://thejns.org/doi/10.3171/CASE25139.