Sensitivity to FGFR inhibitors have been observed in patients harboring FGFR2 fusions with the same breakpoint as that found in the THJ-29T ATC cell line [23] and thus testing for these fusions might provide a tractable therapeutic option for a subset of patients diagnosed with anaplastic thyroid cancer. Here, FGFR2 is linked to thyroid gland undifferentiated (anaplastic) carcinoma.