PMID- 7962349 OWN - NLM STAT- MEDLINE DCOM- 19941221 LR - 20131121 IS - 0021-972X (Print) IS - 0021-972X (Linking) VI - 79 IP - 5 DP - 1994 Nov TI - Variable regions of chromosome 11 loss in different pathological tissues of a patient with the multiple endocrine neoplasia type I syndrome. PG - 1498-502 AB - Multiple endocrine neoplasia type 1 (MEN1) is an autosomal dominant inherited disorder characterized by nodular proliferation of the parathyroid glands and tumors of the anterior pituitary gland, the endocrine pancreas, and the neuroendocrine cell system of the gut. Loss of the putative tumor suppressor effect of the MEN1 gene is probably responsible for the development of MEN1-associated tumors. We report here a genetic study of a female MEN1 patient with the association of nodular hyperplasia of two parathyroid glands, an insulinoma, multiple duodenal gastrinomas, a prolactinoma, and a gastric carcinoid. We performed loss of heterozygosity (LOH) studies of chromosome 11 on all affected tissues except the insulinoma. Allelic losses of chromosome 11 were detected in several tumors, but the chromosomal regions of LOH were different, suggesting that different somatic mutational events are involved in the pathogenesis of these tumors. LOH of chromosome 11 was also detected in the prolactinoma of this patient, which indicates that the MEN1 gene has a tumor suppressor effect in the pituitary. FAU - Beckers, A AU - Beckers A AD - Department of Endocrinology, University of Liege, Belgium. FAU - Abs, R AU - Abs R FAU - Reyniers, E AU - Reyniers E FAU - De Boulle, K AU - De Boulle K FAU - Stevenaert, A AU - Stevenaert A FAU - Heller, F R AU - Heller FR FAU - Kloppel, G AU - Kloppel G FAU - Meurisse, M AU - Meurisse M FAU - Willems, P J AU - Willems PJ LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Clin Endocrinol Metab JT - The Journal of clinical endocrinology and metabolism JID - 0375362 RN - 0 (DNA, Neoplasm) RN - SY7Q814VUP (Calcium) SB - IM GS - MEN1 MH - Calcium/blood MH - *Chromosomes, Human, Pair 11 MH - DNA, Neoplasm/analysis/genetics MH - Female MH - Genetic Linkage MH - Heterozygote MH - Humans MH - Middle Aged MH - Multiple Endocrine Neoplasia Type 1/blood/*genetics/*pathology MH - Neuroendocrine Tumors/genetics/pathology MH - Parathyroid Neoplasms/genetics/pathology MH - Pituitary Neoplasms/genetics/pathology MH - Polymorphism, Restriction Fragment Length EDAT- 1994/11/01 00:00 MHDA- 1994/11/01 00:01 CRDT- 1994/11/01 00:00 PHST- 1994/11/01 00:00 [pubmed] PHST- 1994/11/01 00:01 [medline] PHST- 1994/11/01 00:00 [entrez] AID - 10.1210/jcem.79.5.7962349 [doi] PST - ppublish SO - J Clin Endocrinol Metab. 1994 Nov;79(5):1498-502. doi: 10.1210/jcem.79.5.7962349.