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Presymptomatic genetic screening in families with multiple endocrine neoplasia type 2

✍ Scribed by A. Frilling; W. Höppner; C. Eng; L. Mulligan; F. Raue; C. E. Broelsch

Publisher
Springer
Year
1995
Tongue
English
Weight
474 KB
Volume
73
Category
Article
ISSN
0946-2716

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✦ Synopsis

Medullary thyroid carcinoma occurs sporadically or as a part of the inherited cancer syndrome multiple endocrine neoplasia (MEN) type 2. The MEN 2 gene has been identified as the RET proto-oncogene on chromosome 10. In MEN 2A, RET mutations are detectable in one of five cysteine codons within exons 10 and 11 and in MEN 2B in codon 918 (exon 16). Direct DNA testing for RET proto-oncogene mutations is the method of first choice in presymptomatic screening of MEN 2 families. Gene carriers should be offered prophylactic thyroidectomy. The process of DNA analysis for RET proto-oncogene mutations is demonstrated in one family with hereditary medullary thyroid carcinoma. RET mutations were detectable in five of the nine family members at risk.

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