Conversation: The conversation between human and AI assistant.
[|Human|] hi, I just want to ask regarding my friends concern. he was diagnosed for nasopharyngeal cancer stage IV. The doctor told him that he has to go for chemotheraphy and radiation. i just wonder why did the doctor told him that they have to pull all his teeth? another thing, what are chances of the survival rate for him? would you please tell me about his situation? thank you
[|AI|]  Hi, dairy have gone through your question. I can understand your concern. He has nasopharyngeal cancer.  Treatment of choice depend on type, stage and spread of cancer. Teeth may be removed because they are causing obstruction in treatment. He has stage 4 cancer, so prognosis is poor irrespective of type. Treatment of choice is chemotherapy and radiotherapy. Life expectancy is not good even after treatment. Consult your doctor and take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health.