Conversely, sick leaves was reported as a possible indicator of therapeutic effectiveness, in the case of radiation exposure for differentiated thyroid cancers [32], when the employment of the rhTSH therapy in the current practice of the RTI was assessed [41], as well as when such stimulation procedure was adopted to avoid thyroid hormone withdrawal in the diagnostic follow-up of cancer patients treated with thyroidectomy [25,28,30]. This evidence concerns the gene TG and cancer.