On the other hand, the WT allele (478 bp) was present in the follicular cells from WT thyroids and RET/PTC3 Dicer1(+/−) and RET/PTC3 Dicer1(+/+) thyroid tumors, as expected, but also in RET/PTC3 Dicer1(−/−) thyroid tumors. The gene discussed is NCOA4; the disease is thyroid tumor.