title: Prolactin-secreting pituitary adenoma in a man with gigantism: a case report.
abstract: A prolactin-secreting pituitary adenoma was removed trans-sphenoidally from a 37 years old man with gigantism (218 cm). Serum levels of prolactin (PRL) were elevated pre-operatively and decreased after administration of L-Dopa with no increase after TRH as is usually observed in PRL-secreting adenomas. Growth hormone (GH) and somatomedin serum levels were normal with no modification of GH after insulin hypoglycemia, oral glucose loading or L-Dopa. Morphological examination of the tumour demonstrated the presence of lactotrophs by light and electron microscopy and by immunofluorescense staining. No somatotrophs were found. In this unique case, the relationship between a PRL-secreting adenoma and gigantism is discussed.
mesh_terms: D000236:Adenoma / Q000378:metabolism* / Q000473:pathology; D000328:Adult; D001786:Blood Glucose / Q000032:analysis; D005455:Fluorescent Antibody Technique; D005640:Follicle Stimulating Hormone / Q000097:blood; D005877:Gigantism / Q000503:physiopathology*; D013006:Growth Hormone / Q000097:blood; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D010911:Pituitary Neoplasms / Q000378:metabolism* / Q000473:pathology; D011388:Prolactin / Q000097:blood / Q000378:metabolism*; D011859:Radiography; D012658:Sella Turcica / Q000000981:diagnostic imaging
chemical_list: D001786:Blood Glucose; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D013006:Growth Hormone