PEDIATRICS Vol. 116 No. 3 September 2005, pp. e468-e471 (doi:10.1542/peds.2005-0033)
ELECTRONIC ARTICLE |
Multiple Endocrine Neoplasia Type 2A in a Kindred With C634Y Mutation


* Division of Endocrinology
Department of Pathology and Clinical Laboratories
Division of Pediatric General and Thoracic Surgery, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
Multiple endocrine neoplasia type 2A (MEN 2A) is most frequently caused by codon 634 activating mutations. Medullary thyroid carcinoma has occurred before the age of 2, with pheochromocytomas and primary hyperparathyroidism occurring later in childhood. We report cases of 4 siblings with C634Y-positive MEN 2A (all <11 years old): 3 with medullary thyroid carcinoma (1 had nodal metastasis, and another had a parathyroid adenoma) and 1 with C-cell hyperplasia.
Key Words: multiple endocrine neoplasia MEN 2A hyperparathyroidism parathyroid adenoma medullary thyroid carcinoma pheochromocytoma RET protooncogene
Abbreviations: RET, rearranged during transfection MEN 2A, multiple endocrine neoplasia type 2A MTC, medullary thyroid carcinoma PHE, pheochromocytoma PHPT, primary hyperparathyroidism iPTH, intact parathyroid
Accepted Mar 30, 2005.
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