My cousin was diagnose with testis cancer this year his doc said he is fine now how long can he live after cure of cancer?

Normal life. Testis cancer is curable, .meaning that patients will live their normal life if treated correctly. The treatment is based on the stage of disease. if stage I then removing the tumor should cure most cases without the need of any chemotherapy. however, if the cancer spread to other parts of the body then he will need chemotherapy which will cure most cases.