title: Schwannoma of the sellar region.
abstract: A 25-year-old woman who had experienced brief periods of loss of consciousness and grand mal seizures was found to have a midline mass in the sellar region as evidenced by computer tomography and angiography. Preoperatively, it was thought to be a meningioma but histologically and ultrastructurally it turned out to be a Schwannoma. Since cranial nerves were not involved, clinically or morphologically, this nerve sheath tumour could have originated from Schwann cells of sensory, possibly trigeminal, nerves, vasomotor nerves, or ectopic Schwann cells.
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000473:pathology* / Q000601:surgery; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008579:Meningioma / Q000175:diagnosis; D009442:Neurilemmoma / Q000473:pathology* / Q000601:surgery; D012658:Sella Turcica; D014057:Tomography, X-Ray Computed