CLU mRNA variants analyses according to the SIAPEC cytological classification. CLU2 and CLU1 expression in the TIR3 (A) and TIR4 + TIR5 (B) neoplastic thyroid samples, compared to normal thyroid tissues (NT). Data are expressed according to the histological diagnosis after surgery. (C) CLU2 expression in TIR3 thyroid samples according to histological classification (i.e., benign vs. malignant) after surgery. CLU2 expression was compared to CLU1, arbitrarily setted as 100%.