TG and neoplasm: In that study in which we used partially the same material as in this paper, we found highly consistent ccRCC tumor specific disturbances of thyroid hormone pathway: decrease of thyroid hormone receptor β1 (TRβ1) mRNA and protein, loss of type 1 iodothyonine deiodinase protein and lowered level of thyroid hormone, triiodothyronine (T3).