For example, [83] pancreatic cancer and renal cell carcinoma are sensitive to RT, which may be related to their dependence on cystine uptake [73, 84]; inhibition of SLC7A11 and promotion of ferroptosis can increase the radiosensitivity of esophageal squamous cell carcinoma [74]. The gene discussed is SLC7A11; the disease is esophageal squamous cell carcinoma.