title: Metastatic renal cell carcinoma mimicking pituitary adenoma: case report.
abstract: A 54-year-old man, with a past history of renal cell carcinoma, presented with bitemporal visual field defect, hyponatremia, and diabetes insipidus. Endocrinological examination revealed panhypopituitarism. Computed tomography and magnetic resonance imaging showed an intrasellar mass with suprasellar extension. The initial radiological impression was pituitary adenoma. The tumor was decompressed via the transsphenoidal route. Histological examination revealed metastatic renal cell carcinoma. The clinical characteristics of metastatic pituitary carcinoma appear to be panhypopituitarism, and neuroimaging findings of strong enhancement of the tumor and bony destruction without marked sellar enlargement.
authors.affiliation: Department of Neurosurgery, Sapporo Medical University School of Medicine, Japan.
authors.forename: He
authors.initials: H
authors.lastname: Liu
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Yamaki
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Oka
authors.forename: Izumi
authors.initials: I
authors.lastname: Koyanagi
authors.forename: Kiyohiro
authors.initials: K
authors.lastname: Houkin
mesh_terms: D002292:Carcinoma, Renal Cell / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D007018:Hypopituitarism / Q000209:etiology / Q000473:pathology; D007680:Kidney Neoplasms / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D018365:Neoplasm, Residual / Q000556:secondary* / Q000628:therapy; D019635:Neurosurgical Procedures; D010902:Pituitary Gland / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D010911:Pituitary Neoplasms / Q000175:diagnosis / Q000556:secondary* / Q000601:surgery; D015175:Prolactinoma / Q000175:diagnosis*; D011859:Radiography; D011878:Radiotherapy; D012658:Sella Turcica / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D016896:Treatment Outcome