Thyroid tissue blocks from 42 consecutive pediatric WDTC patients who underwent thyroidectomy between 2001 and 2013 were analyzed at Quest Diagnostics for BRAF(V600E), RAS mutations (N,K,H), and RET/PTC and PAX8/PPAR? rearrangements, using validated molecular methods.     ///    "Of patients with BRAF(V600E), 77.8% were Hispanic and 88.9% were >15 years, while all RET/PTC-positive patients were ?15 years (p?=?0.003). "    ///    "Mutations were noted in 21/39 (53.8%), with both BRAF(V600E) (n?=?9), and RET/PTC (n?=?6) detected only in PTC. "    ///    "Of 28 PTC patients, 57.1% had mutations: 32.1% with BRAF(V600E), 21.4% with RET/PTC, and 3.6% with NRAS. "