PMID: 11815959Jan 30, 2002Paper

Medullary thyroid carcinoma as part of a multiple endocrine neoplasia type 2B syndrome: influence of the stage on the clinical course

S LeboulleuxE Baudin


Multiple endocrine neoplasia type 2B (MEN 2B) is an exceptional syndrome, for which the optimal age of thyroidectomy is poorly established and the course of medullary thyroid carcinoma (MTC) is ill-defined. All the 18 patients with a MEN 2B syndrome examined at the Institut Gustave Roussy were included in a single-center retrospective study. There were 9 men and 9 women with a mean age of 13 years (range, 2-27 years) at diagnosis. The diagnosis of MTC was based on the presence of a thyroid nodule or involved neck lymph nodes and on dysmorphic features of MEN 2B in 60% and 40% of the cases, respectively. The classic M918T mutation in exon 16 was found in the 16 patients in whom it was investigated. At diagnosis, 2 patients had Stage I MTC, 15 patients had Stage III, and 1 patient had Stage IV disease. T1 MTC was found in 4 patients aged 2.1-3.7 years. However, two of these patients already had N1 disease. One patient with Stage I MTC, aged 3.4 years and 2 patients with Stage III disease, aged 14 and 25 years, had undetectable basal calcitonin (CT) after initial surgery. During follow-up, basal CT became detectable in one of three patients. Among the 15 other patients with an elevated postoperative CT level, metastases were demon...Continue Reading


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