The invention provides a method and/or composition for the treatment of bone cancer including primary bone cancer and secondary bone cancer, breast cancer, skin cancer, nasopharyngeal carcinoma, oral cancer, vulva cancer, prostate cancer, cervical cancer, melanoma including melanocarcinoma by percutaneous and/or transmucosal administration of the interferon. Further, the invention provides a method and/or composition for the treatment of skin, subcutaneous, mucosal and/or submucosal primary cancer and cancer metastatic lesions by percutaneous and/or transmucosal administration of the interferon, especially a method and/or composition for the treatment of bone cancer pain including pain resulted by secondary bone cancer.