title: Medullary thyroid carcinoma.
abstract: Medullary thyroid carcinoma (MTC) arises from parafollicular or C cells that produce calcitonin (CT), and accounts for 5-10% of all thyroid cancers. MTC is hereditary in about 25% of cases. The discovery of a MTC in a patient has several implications: disease extent should be evaluated, phaeochromocytoma and hyperparathyroidism should be screened for and whether the MTC is sporadic or hereditary should be determined by a direct analysis of the RET proto-oncogene. In this review, pathological characteristics, tumour markers and genetic abnormalities in MTC are discussed. The diagnostic and therapeutic modalities applied to patients with clinical MTC and those identified with preclinical disease through familial screening are also described. Progresses concerning genetics, initial treatment, follow-up, screening and treatment of pheochromocytoma have permitted an improvement in the long-term outcome. However, there is no effective treatment for distant metastases, and new therapeutic modalities are urgently needed.
authors.affiliation: Institut Gustave Roussy, Villejuif, France.
authors.forename: Sophie
authors.initials: S
authors.lastname: Leboulleux
authors.forename: Eric
authors.initials: E
authors.lastname: Baudin
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Travagli
authors.forename: Martin
authors.initials: M
authors.lastname: Schlumberger
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood; D002116:Calcitonin / Q000097:blood; D002272:Carcinoembryonic Antigen / Q000097:blood; D018276:Carcinoma, Medullary / Q000235:genetics / Q000378:metabolism / Q000628:therapy; D018095:Germ-Line Mutation; D006801:Humans; D011379:Prognosis; D000090063:Proto-Oncogene Mas; D013964:Thyroid Neoplasms / Q000235:genetics / Q000378:metabolism / Q000628:therapy; D013965:Thyroidectomy
chemical_list: D014408:Biomarkers, Tumor; D002272:Carcinoembryonic Antigen; C000715470:MAS1 protein, human; D000090063:Proto-Oncogene Mas; D002116:Calcitonin