PMID- 21358189 OWN - NLM STAT- MEDLINE DCOM- 20110531 LR - 20211203 IS - 0065-3071 (Print) IS - 0065-3071 (Linking) VI - 70 DP - 2011 TI - Multiple endocrine neoplasia: types 1 and 2. PG - 84-90 LID - 10.1159/000322479 [doi] AB - Multiple endocrine neoplasia type 1 (MEN 1) and type 2 (MEN 2) are autosomal-dominantly inherited syndromes where highly penetrant germline mutations predispose patients to the development of tumours in hormone-secreting cells. In the case of MEN 1, loss-of-function germline mutations in the tumour suppressor gene MEN1 increase the risk of developing pituitary, parathyroid and pancreatic islet tumours, and less commonly thymic carcinoids, lipomas and benign adrenocortical tumours. In the case of MEN 2, gain-of-function germline mutations clustered in specific codons of the RET proto-oncogene increase the risk of developing medullary thyroid carcinoma (MTC), phaeochromocytoma and parathyroid tumours. Offering RET testing is best practice for the clinical management of patients at-risk of MEN 2, and MEN 2 has become a classic model for the integration of molecular medicine into patient care. Prophylactic thyroidectomy in an asymptomatic RET mutation carrier to address the risk of developing MTC can prevent or cure this malignancy. No similar preventative strategies can be employed to prevent or cure MEN 1-associated tumours. Genetic testing for MEN 1 is therefore both more complex due to a general lack of mutational hotspots, and the benefit to patients is less straight forward. While a number of genotype-phenotype correlations exist in MEN 2, providing further rationale for performing genetic testing in this condition, these correlations are absent in MEN 1. This review summarises our current knowledge of these two syndromes with emphasis on those aspects with specific relevance to the otorhinolaryngologist. CI - Copyright (c) 2011 S. Karger AG, Basel. FAU - Marsh, Deborah J AU - Marsh DJ FAU - Gimm, Oliver AU - Gimm O LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20110224 PL - Switzerland TA - Adv Otorhinolaryngol JT - Advances in oto-rhino-laryngology JID - 0242534 RN - 0 (Codon) RN - 0 (MAS1 protein, human) RN - 0 (MEN1 protein, human) RN - 0 (Proto-Oncogene Mas) RN - 0 (Proto-Oncogene Proteins) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-ret) RN - EC 2.7.10.1 (RET protein, human) SB - IM MH - Codon MH - Genetic Association Studies MH - Genetic Predisposition to Disease MH - Genetic Testing MH - Germ-Line Mutation MH - Humans MH - Multiple Endocrine Neoplasia Type 1/*genetics/pathology/therapy MH - Multiple Endocrine Neoplasia Type 2a/*genetics/pathology/therapy MH - Neoplasms/*genetics MH - Proto-Oncogene Mas MH - Proto-Oncogene Proteins/genetics MH - Proto-Oncogene Proteins c-ret/genetics MH - Thyroid Neoplasms/genetics/surgery EDAT- 2011/03/02 06:00 MHDA- 2011/06/01 06:00 CRDT- 2011/03/02 06:00 PHST- 2011/03/02 06:00 [entrez] PHST- 2011/03/02 06:00 [pubmed] PHST- 2011/06/01 06:00 [medline] AID - 000322479 [pii] AID - 10.1159/000322479 [doi] PST - ppublish SO - Adv Otorhinolaryngol. 2011;70:84-90. doi: 10.1159/000322479. Epub 2011 Feb 24.