In summary, this study demonstrated that: (1) the ROS/PI3K/Akt/mTOR and RAS/RAF/MEK/ERK signaling pathways function in conjunction with H2S to promote thyroid cancer cell growth and (2) H2S exerts cancer cell growth-promoting or -inhibiting effects depending on the dosage [73]. This evidence concerns the gene PIK3CG and thyroid gland carcinoma.