Polymorphisms: GSTO1*A140D (C419A; rs4925), polymorphisms of other GSTs (GSTM1, GSTT1, GSTP1), CYP1A1, and codon 72 of p53Main findings: - no association between GSTO1*A140D polymorphism (alone or in combination with other polymorphisms) and clinico-pathological features of thyroid nodules. The gene discussed is GSTO1; the disease is thyroid nodule.