High levels of thyroid hormone can promote proliferation of some cancers [47], and thyroid hormone mimetics which function as antagonists, such as tetraiodothyroacetic acid (tetrac) and triiodothyroacetic acid (triac) appear to exhibit an antiproliferative effect on breast cancer [47] and T cell lymphomas [48]. Here, TG is linked to T-cell non-Hodgkin lymphoma.