A third sample contained an ETV6-NTRK3 fusion (Figure S2C), an alteration previously reported in association with infantile fibrosarcoma, congenital mesoblastic nephromas, secretory carcinoma of breast, mammary analogue secretory carcinoma of salivary gland, and radiation-associated thyroid cancer [23]–[27]. This evidence concerns the gene ETV6 and thyroid cancer.