We report the case of a woman with a sporadic medullary thyroid carcinoma. Genomic analysis found that her tumor did not\ncontain any common RET mutations but did harbor a BRAF V600E mutation. Only one other well-confirmed example of the\nBRAF V600E mutation has been reported in an MTC patient. We conclude that this common BRAF mutation may independently\ndrive neoplastic transformation of human parafollicular C cells.
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