Tumors of the parasellar region.
D001932:Brain Neoplasms / Q000601:surgery*; D005910:Glioma / Q000601:surgery; D006801:Humans; D008579:Meningioma / Q000601:surgery; D008722:Methods; D009897:Optic Chiasm; D009900:Optic Nerve; D012658:Sella Turcica