For instance, Interleukin-2 (IL-2) is approved for treating metastatic renal cancer and advanced melanoma, while interferon-alpha (IFN-α) is utilized to treat patients with conditions like AIDS-related Kaposi sarcoma, hairy cell leukemia, chronic myeloid leukemia, and follicular lymphoma. This evidence concerns the gene IL2 and Kaposi's sarcoma.