Multiple endocrine neoplasia type 1 (MEN 1) is an autosomal dominant familial cancer syndrome characterized by tumors in parathyroids, enteropancreatic endocrine tissues, and anterior pituitary. In 1997, the
MEN 1 gene was identified and cloned. It is on chromosome 11q13 and has 10 exons. It encodes a 610 amino acid protein called MENIN. However, many different germline mutations in MEN 1 families have been reported, there were no hotspot of mutation. The correlation between
MEN 1 mutation and clinical datas has not been established yet. Recently, the possible function of MENIN protein has been reported. MEN 2 is also autosomal dominant trait, characterized by medullary thyroid carcinoma (MTC), and it can be divided into two type, MEN 2A and 2B. In 1993,
RET gene was identified and it,s mutations has shown to be associated with MEN 2. In recent years, the correlation between RET mutation and clinical features have been revealed. The identification of
MEN 1 and
RET mutation by employing DNA test, will facilitate early diagnosis and treatment.
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