title: Corticotroph cell hyperplasia in a patient with Addison disease: case report.
abstract: A woman with Addison disease developed hyperpigmentation, headache, and nausea despite conventional replacement therapy with cortisone. Excessively elevated plasma adrenocorticotropic hormone (ACTH) with absence of response to administration of corticotropin-releasing factor (CRF), and roentgenological evidence of enlargement of the sella turcica, as well as detection of enlarged pituitary gland on magnetic resonance images, led to a diagnosis of ACTH-producing microadenoma, which was removed by transsphenoidal microsurgery. The specimen obtained at surgery evidenced corticotroph hyperplasia, as demonstrated by immunohistochemical staining for ACTH. Fine structure exhibited densely granulated cells with a few bundles of microfilaments and an abundance of large lysosomal bodies. Surgical removal of the hyperplasia alleviated the patient's symptoms, and hyperpigmentation faded remarkably. Her plasma ACTH level returned to normal, has remained normal for more than 3 years, and responds adequately to CRF administration.
authors.affiliation: Department of Neurosurgery, Fukui Medical School, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kubota
authors.forename: M
authors.initials: M
authors.lastname: Hayashi
authors.forename: M
authors.initials: M
authors.lastname: Kabuto
authors.forename: N
authors.initials: N
authors.lastname: Shirasaki
authors.forename: H
authors.initials: H
authors.lastname: Aradachi
authors.forename: K
authors.initials: K
authors.lastname: Miyanaga
authors.forename: S
authors.initials: S
authors.lastname: Miyabo
mesh_terms: D000224:Addison Disease / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D000324:Adrenocorticotropic Hormone / Q000378:metabolism*; D000328:Adult; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010903:Pituitary Gland, Anterior / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D012658:Sella Turcica / Q000601:surgery
chemical_list: D000324:Adrenocorticotropic Hormone