FOXE1 and thyroid gland carcinoma: Furthermore, the polymorphism in the length of the poly-A tract of FOXE1 (rs71369530), which has been associated with thyroid cancer (Kallel et al. 2010), has been demonstrated to be in tight linkage disequilibrium with rs1867277, in addition to being associated (FOXE116Ala) with PTC (Bullock et al. 2012).