<s>[INST] hello my father has oral cancer and its of 4 stage he has recieved 3 chemotherapy sittings 2 operations and 1 month radiation treatment .he has also recieved target treatment and now he is undergoing ozone therapy but still has 5 tumors on his face age43 help him [/INST] Your father has received almost all possible treatment modalities available. At the moment only palliative treatment looks possible. If the tumors on his face are respectable then surgery should be done. Otherwise, palliative chemotherapy should be given. For details regarding the chemotherapy options previous chemotherapy given, current performance status of patient, age of patient and baseline lab investigations would be required. Please discuss it with the treating oncologist and if you have any further query I would be more than happy to answer. </s>