Compared to patients with BRAF<sup>V600E</sup> PTC, those with isolated NTRK-fusion (n=34) were significantly younger (median age: 35.0 vs 43.0 years), had larger tumors (median diameter: 10.5 vs 7.0 mm), higher rates of LNM (76.5% vs 50.7%), and greater prevalence of co-existing Hashimoto's thyroiditis (61.8% vs 28.3%) and follicular nodular disease (26.5% vs 10.6%) (all <i>P</i> < 0.01). Here, BRAF is linked to Hashimoto thyroiditis.