Circ_0067934 has been found to play a pro-carcinogenic role in a variety of cancers, and it was found that in thyroid cancer, knockdown of circ_0067934 enhanced Fe2+, intracellular iron and ROS levels and promoted the development of ferroptosis, while inhibition of miR-545-3p and overexpression of SLC7A11 reversed this effect. Here, SLC7A11 is linked to cancer.