Introduction: Multiple endocrine neoplasia 2A (MEN2A) is an autosomal dominant syndrome associated with germline mutations in the RET proto-oncogene that may lead to medullary thyroid carcinomas (MTC), pheochromocytomas, and parathyroid adenomas. Patients generally present between the ages of 20 and 30 years. MEN2 patients are stratified for risk based upon the RET mutation, and a genotype-phenotype correlation exists.
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