Conversation: The conversation between human and AI assistant.
[|Human|] My father has been having chemotherapy for bowel cancer which has spread to lungs and liver.  He has had no side effects from the chemo except tiredness.  Today however after 10 doses of what was intended to be a 24 week course he has been told they are stopping his chemotherapy because of of his increasing psa count.  Why would they do this if there are no apparent negative side effectsHe Is due a ct scan in a weeks time, and a revisit to his consultant in three weeks
[|AI|]  Hi and welcome to Chat Doctor. Thank you for your query.I've never heard that PSA level can because for chemotherapy canceling. It can be stopped due to add general condition or when it is not expected to prolong life. I am sure you misunderstood something. More likely is that doctors evaluated that chemo has no purpose because of terminal cancer stage or there is no good effect of chemo on cancer. Wish you good health.