Conversation: The conversation between human and AI assistant.
[|Human|] Hello, My dad (69 yrs old) was recently diagnosed with Prostate cancer -- stage 4. His PSA level is 110 but bone scan came back negative. His biopsy reflected a Gleason score of 3+4=7.  Hes always been very healthy and also has no other urinary tract problems commonly associated with prostate cancer. However he has had a severe lower back pain these past three months - this was also aggravated by a recent fall. Hes now on complete bed rest because hes unable to walk. Is this indeed stage 4 of the disease? But his bone scan shows up negative. What are his chances of survival? Please advise. Thanks.
[|AI|]  Hi, dairy have gone through your question. I can understand your concern.  He may have metastatic carcinoma in spine.  It causes back pain.  He has Gleason score 7, so it suggests good prognosis. But he has stage 4 disease do difficult to treat.  Chemotherapy and radiotherapy is the treatment of choice. Despite treatment life expectancy is not good.  Consult your doctor and plan 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.