Context: Primary hyperparathyroidism (HPT) presents as a part of inherited syndromes such as multiple endocrine neoplasia (MEN) types 1 and 2. In patients with MEN1, parathyroid hyperplasia or multiple adenomas occur in approximately 90-95%. MEN2A-related HPT is characterized by a mild hypercalcemia, which is mostly asymptomatic.
Objective: Here we present a family with coexistence of MEN1 gene mutation and RET mutation.
Results: Six family members carrying MEN1 gene mutation IVS5 + 1G>A only, one family member with RET mutation Y791F, and three family members with both MEN1 gene and RET mutation were studied. The key to diagnosis was recurrent HPT in a young male carrying RET mutation Y791F, a mutation not likely to give rise to recurrent HPT.
Conclusion: MEN1 gene mutation and RET codon 791 mutation in the same patient did not affect the typical phenotype of MEN1 or MEN2, and also the course of diseases seems to be unchanged. The reason may be that both mutations, although contributing to tumor pathogenesis, do not interact and induce a worsening of the cancer syndromes.
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http://dx.doi.org/10.1210/jc.2004-1759 | DOI Listing |
J Clin Endocrinol Metab
January 2025
Metabolic Diseases Branch, Bldg. 10/Rm 8C-101, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD 20892.
Establishing genotype-phenotype correlations in disorders of hereditary endocrine neoplasia is important for clinical screening, genetic counseling, prognostication, surveillance, and surgical strategy, and may also provide clues about disease pathogenesis. Important genotype-phenotype correlations are recognized, for example, in pheochromocytoma/paraganglioma and multiple endocrine neoplasia type 2A. The presence of such correlations has been less clear in other familial endocrine disorders associated with primary hyperparathyroidism including multiple endocrine neoplasia type 1 (MEN1), and the hyperparathyroidism-jaw tumor syndrome (HPT-JT).
View Article and Find Full Text PDFRev Med Chil
June 2024
Departamento de endocrinología, Hospital Clínico San Borja Arriarán, Santiago, Chile.
Multiple endocrine neoplasia type 1 (MEN1) is a rare autosomal dominant disease with an estimated prevalence of 2 per 100,000. This disease is caused by a mutation in the tumor suppressor gene MEN1, which is located on chromosome 11 and codifies the menin protein. It is characterized by a predisposition of parathyroids, enteropancreatic, and anterior pituitary tumors, affecting the quality of life and lifespan of those who have the disease.
View Article and Find Full Text PDFFront Endocrinol (Lausanne)
December 2024
Diabetes Center, Ohta Nishinouchi Hospital, Koriyama, Fukushima, Japan.
Endocr Oncol
January 2024
Department of Molecular Medicine and Pathology, School of Medical Sciences, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
Although the gene has a long-standing association with cancer, its mechanisms of action remain incompletely understood, acting both as a tumour suppressor in neuroendocrine tumours and as an oncogene in leukaemia. The best-characterised isoform of the encoded protein, MENIN, is the 610-amino acid MENIN isoform 2. We hypothesise that some of the complexity of biology can be attributed to a currently unappreciated contribution of different MENIN isoforms.
View Article and Find Full Text PDFPancreatology
November 2024
Pancreatobiliary Cancer Center, Yonsei Cancer Center, Severance Hospital, Seoul, South Korea; Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, Yonsei University College of Medicine, Seoul, South Korea. Electronic address:
Background: Pancreatic neuroendocrine tumors (PNETs) are the leading cause of death related to multiple endocrine neoplasia type 1 (MEN1). Previous studies have linked certain mutations in the MEN1 gene and loss of interactions with MENIN's functional partners to the mortality or aggressiveness of PNETs. This study aimed to evaluate the genotype-phenotype correlations of MEN1-related PNETs in Korean patients and to summarize the treatment outcomes comprehensively.
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