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Table of Contents
Vol. 71, Suppl. 2, 2009
Issue release date: April 2009
Section title: Clinical Studies on Pituitary Tumorigenesis
Horm Res 2009;71(suppl 2):131–138
(DOI:10.1159/000192450)

The MEN1 Gene and Pituitary Tumours

Agarwal S.K. · Ozawa A. · Mateo C.M. · Marx S.J.
Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Md., USA

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Article / Publication Details

First-Page Preview
Abstract of Clinical Studies on Pituitary Tumorigenesis

Published online: 4/29/2009

Number of Print Pages: 8
Number of Figures: 3
Number of Tables: 3

ISSN: 1663-2818 (Print)
eISSN: 1663-2826 (Online)

For additional information: http://www.karger.com/HRP

Abstract

Sporadic multiple endocrine neoplasia type 1 (MEN1) is defined as the occurrence of tumours in two of three main endocrine tissue types: parathyroid, pituitary and pancreaticoduodenal. A prolactinoma variant or Burin variant of MEN1 was found to occur in three large kindreds, with more prolactinomas and fewer gastrinomas than typical MEN1. MEN1 tumours differ from common tumours by showing features from the MEN1 gene (e.g. larger pituitary tumours). They also show various expressions of tumour multiplicity; however, pituitary tumour in MEN1 is usually solitary. Diagnosis in MEN1 carriers during childhood is not directed at cancers but at benign morbid tumours. Morbid prolactinoma occurred at the age of 5 years in one MEN1 individual; hence, this is the earliest age at which to recommend tumour surveillance in carriers. The MEN1 gene shows biallelic inactivation in 30% of some types of common variety endocrine tumours (e.g. parathyroid adenoma, gastrinoma, insulinoma and bronchial carcinoid), but in only 1–5% of common pituitary tumours. Heterozygous knockout of MEN1 in mice provides a robust model of MEN1 and has been found to support further research on anti-angiogenesis therapy for pituitary tumours. The rarity of MEN1 mutations in some MEN1-like states aids the identification of other mutated genes, such as AIP, HRPT2 and p27Kip1. We present recent clinical and basic findings about the MEN1 gene, particularly concerning hereditary vs. common variety pituitary tumours.


  

Author Contacts

Stephen J. Marx, MD
National Institutes of Health
Building 10, Room 9C-103
Bethesda, MD 20892-1802 (USA)
Tel. +1 301 496 5051, Fax +1 301 496 0200, E-Mail marxs@mail.nih.gov

  

Article Information

Published online: April 29, 2009
Number of Print Pages : 8
Number of Figures : 3, Number of Tables : 3, Number of References : 54

  

Publication Details

Hormone Research (From Developmental Endocrinology to Clinical Research)

Vol. 71, No. Suppl. 2, Year 2009 (Cover Date: April 2009)

Journal Editor: Czernichow P. (Paris)
ISSN: 0301-0163 (Print), eISSN: 1423-0046 (Online)

For additional information: http://www.karger.com/HRE


Article / Publication Details

First-Page Preview
Abstract of Clinical Studies on Pituitary Tumorigenesis

Published online: 4/29/2009

Number of Print Pages: 8
Number of Figures: 3
Number of Tables: 3

ISSN: 1663-2818 (Print)
eISSN: 1663-2826 (Online)

For additional information: http://www.karger.com/HRP


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