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[Multiple endocrine neoplasia type 2].

P Niccoli-Sire1, B Conte-Devolx

  • 1Service d'endocrinologie, Diabète, maladies métaboliques, CHU de La Timone, faculté de médecine de Marseille, université de la Méditerranée, Assistance publique-Hôpitaux de Marseille, Marseille, France. patricia.niccoli-sire@ap-hm.fr

Annales D'Endocrinologie
|July 14, 2007
PubMed
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Multiple endocrine neoplasia type 2 (MEN2) is an inherited disorder caused by RET gene mutations. Early diagnosis and prophylactic thyroidectomy in at-risk individuals significantly improve outcomes for MEN2 patients.

Area of Science:

  • Genetics
  • Endocrinology
  • Oncology

Background:

  • Multiple Endocrine Neoplasia type 2 (MEN2) is a rare, inherited autosomal dominant disorder.
  • It presents in three main variants: MEN2A, MEN2B, and familial isolated medullary thyroid carcinoma (FMTC).
  • The disease originates from neural crest cells and involves mutations in the RET proto-oncogene.

Purpose of the Study:

  • To describe the phenotypic variants of MEN2.
  • To explain the genetic basis and natural history of MEN2.
  • To outline diagnostic and management strategies for MEN2.

Main Methods:

  • Review of the natural history and genetic basis of MEN2.
  • Analysis of RET gene mutations for diagnosis.
  • Description of surgical management for MTC, pheochromocytoma, and hyperparathyroidism.

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Main Results:

  • MEN2 diagnosis is confirmed by identifying germline RET mutations.
  • Medullary thyroid carcinoma (MTC) is the most common initial diagnosis.
  • Pheochromocytoma and hyperparathyroidism are often associated with undiagnosed MTC.

Conclusions:

  • Early diagnosis through familial genetic screening is crucial for at-risk individuals.
  • Prophylactic thyroidectomy offers the best chance of cure.
  • Complete surgical management of MTC, pheochromocytoma, and hyperparathyroidism is essential for optimal patient prognosis.