PMID- 8626844 OWN - NLM STAT- MEDLINE DCOM- 19960621 LR - 20041117 IS - 0021-972X (Print) IS - 0021-972X (Linking) VI - 81 IP - 5 DP - 1996 May TI - Prolactinomas in a large kindred with multiple endocrine neoplasia type 1: clinical features and inheritance pattern. PG - 1841-5 AB - Multiple endocrine neoplasia type 1 (MEN 1) is associated with neoplasia and hyperfunction of the parathyroid and pituitary glands, pancreatic islet cells, and neuroendocrine cells of the gut. The inheritance pattern is autosomal dominant, and the underlying genetic defect is situated at chromosome 11q13. The MEN 1 gene behaves as a defective copy of a normally constitutive tumor suppressor gene. Development of the MEN 1 phenotype, however, is a multistep and multifactorial process. The Tasman 1 genealogy is the largest MEN 1 pedigree detected to date. Thus far, 90 related members with MEN 1 have been screened for evidence of prolactinoma. Prolactinomas were found in 18 patients (20%). Prolactinomas were not evenly distributed in the genealogy; in 2 branches of the overall genealogy prolactinomas were present in 50% or more of MEN 1-affected members. The familial distribution of prolactinomas in these branches was consistent with an autosomal dominant mode of inheritance. In the remainder of the pedigree, prolactinomas were uncommon and did not display this inheritance pattern. This pedigree represents one of the largest published MEN 1 genealogies in which the risk of developing prolactinoma follows an autosomal dominant pattern of transmission. It is the first to demonstrate an inheritance pattern for prolactinomas acting in addition to, yet distinct from, the inheritance of the underlying MEN 1 gene defect. These findings are consistent with the existence of an undefined second genetic defect involved in the pathogenesis of prolactinoma in MEN 1. FAU - Burgess, J R AU - Burgess JR AD - Department of Diabetes and Endocrine Services, Royal Hobart Hospital, Australia. FAU - Shepherd, J J AU - Shepherd JJ FAU - Parameswaran, V AU - Parameswaran V FAU - Hoffman, L AU - Hoffman L FAU - Greenaway, T M AU - Greenaway TM LA - eng PT - Journal Article PL - United States TA - J Clin Endocrinol Metab JT - The Journal of clinical endocrinology and metabolism JID - 0375362 SB - IM MH - Adult MH - Chromosomes, Human, Pair 11 MH - Female MH - Humans MH - Hyperparathyroidism/complications MH - Male MH - Multiple Endocrine Neoplasia Type 1/*genetics MH - Pancreatic Diseases/complications MH - Pedigree MH - Pituitary Neoplasms/*genetics MH - Prolactinoma/*genetics EDAT- 1996/05/01 00:00 MHDA- 1996/05/01 00:01 CRDT- 1996/05/01 00:00 PHST- 1996/05/01 00:00 [pubmed] PHST- 1996/05/01 00:01 [medline] PHST- 1996/05/01 00:00 [entrez] AID - 10.1210/jcem.81.5.8626844 [doi] PST - ppublish SO - J Clin Endocrinol Metab. 1996 May;81(5):1841-5. doi: 10.1210/jcem.81.5.8626844.