A new double substitution mutation in the MEN1 gene: A limited penetrance and a specific phenotype

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Abstract

Multiple endocrine neoplasia type 1 (MEN1) is an autosomal-dominant cancer syndrome that is caused by a germline mutation in the MEN1 gene encoding a tumour-suppressor protein, menin. MEN1 causes a combination of endocrine tumours such as parathyroid adenomas, pituitary adenomas, glucagonomas, gastrinomas, insulinomas, adrenocortical adenomas and non-endocrine tumours. We here present a large MEN1 family where the carriers developed mild hyperparathyroidism, multiple well-differentiated functionally active neuroendocrine tumours of the pancreas and no pituitary tumour. The causal mutation is a new double substitution in the coding region of exon 2 in the MEN1 gene c.[428T>A; 429C>T], p.Leu143His. This new mutation in the MEN1 gene is clinically relevant leading to a limited penetrance and specific phenotype.

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Ullmann, U., Unuane, D., Velkeniers, B., Lissens, W., Wuyts, W., & Bonduelle, M. (2013). A new double substitution mutation in the MEN1 gene: A limited penetrance and a specific phenotype. European Journal of Human Genetics, 21(6), 695–697. https://doi.org/10.1038/ejhg.2012.241

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