title: Primary hyperparathyroidism in patients with multiple endocrine neoplasia type 1: comparison with sporadic parathyroid adenomas.
abstract: A prospective study on the natural course of primary hyperparathyroidism has recently been reported. Since hyperparathyroidism in multiple endocrine neoplasia type 1 (MEN 1) is genetically distinct from most forms of sporadic hyperparathyroidism, it is important to know the natural course of hyperparathyroidism in MEN 1 for better clinical management. For this purpose, we retrospectively reviewed clinical parameters of patients with MEN 1 when they were diagnosed as having hyperparathyroidism, and compared them with those of patients with sporadic primary hyperparathyroidism. In patients with MEN 1: 1) levels of intact PTH (i-PTH) gradually increased with age, which accelerated over 40 years; 2) compared to the steep rise in i-PTH levels in aged patients, increase in serum calcium or decrease of serum inorganic phosphate concentration was relatively mild, and 3) the high concentrations of i-PTH in aged patients were not due to renal insufficiency. These features were not observed in patients with sporadic primary parathyroid adenomas. Clinical features of untreated hyperparathyroidism in MEN 1 may be significantly affected by the age of the patient. The effect, if any, of age-dependent deterioration on recurrence rate after subtotal or total parathyroidectomy requires further elucidation.
authors.affiliation: Department of Aging Medicine and Geriatrics, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621 Japan.
authors.forename: M
authors.initials: M
authors.lastname: Katai
authors.forename: A
authors.initials: A
authors.lastname: Sakurai
authors.forename: Y
authors.initials: Y
authors.lastname: Ikeo
authors.forename: K
authors.initials: K
authors.lastname: Hashizume
mesh_terms: D000236:Adenoma / Q000097:blood; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000097:blood*; D002118:Calcium / Q000097:blood; D005260:Female; D006801:Humans; D006961:Hyperparathyroidism / Q000097:blood* / Q000150:complications / Q000473:pathology; D008297:Male; D008875:Middle Aged; D018761:Multiple Endocrine Neoplasia Type 1 / Q000097:blood* / Q000150:complications / Q000235:genetics; D009929:Organ Size; D010280:Parathyroid Glands / Q000473:pathology; D010281:Parathyroid Hormone / Q000097:blood*; D010282:Parathyroid Neoplasms / Q000097:blood* / Q000473:pathology; D010710:Phosphates / Q000097:blood; D012044:Regression Analysis; D051437:Renal Insufficiency / Q000097:blood; D012189:Retrospective Studies
chemical_list: D010281:Parathyroid Hormone; D010710:Phosphates; D002118:Calcium