title: Intrasellar paraganglioma presenting as nonfunctioning pituitary adenoma.
abstract: Paragangliomas arising in the sellar region are rare. We report a case of intrasellar paraganglioma of a 54-year-old man who presented with gradually decreasing visual acuity. Physical examination revealed bitemporal hemianopsia with no apparent signs of endocrinologic dysfunction. Magnetic resonance imaging revealed a large sellar mass believed to be a nonfunctioning pituitary adenoma. The tumor was removed transsphenoidally and submitted for histologic examination. The morphologic features, based on histologic, immunocytochemical, and electron microscopic analyses, were consistent with the diagnosis of paraganglioma. The diagnostic morphologic features and the immunocytochemical profile of the tumor are reported.
authors.affiliation: Department of Pathology and Neurosurgery, G. Gennimatas Athens General Hospital, Greece.
authors.forename: D
authors.initials: D
authors.lastname: Sambaziotis
authors.forename: G
authors.initials: G
authors.lastname: Kontogeorgos
authors.forename: K
authors.initials: K
authors.lastname: Kovacs
authors.forename: E
authors.initials: E
authors.lastname: Horvath
authors.forename: A
authors.initials: A
authors.lastname: Levedis
mesh_terms: D000236:Adenoma / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D010235:Paraganglioma / Q000473:pathology*; D010911:Pituitary Neoplasms / Q000473:pathology*