Conversation: The conversation between human and AI assistant.
[|Human|] My fiance has prostate cancer . We just ran his b/w again today and his PSA is down from .77 to .55 in 2 months but his CEA is up to 13.9. The highest it has ever been is when first diagnosed 2 and half years ago; 6.9. After prostatecomy and radiation , it has hovered around 1.9. The last time CEA was run was 13 months ago so it jumped from 1.9 to 13.9 in a year. Is this a sign of new cancer; colorectal?
[|AI|]  Hi and welcome to Chat Doctor. Thank you for the query. CEA is a marker for colorectal carcinoma, but also some other conditions can cause its elevation, this is not very specific and this is usually used in following patients with confirmed colorectal carcinoma. This is just slight elevation and i don't think you should be worried, but I suggest doing colonoscopy just to rule this out. Wish you good health. Regards