Conversation: The conversation between human and AI assistant.
[|Human|] I hope so my son had a colonoscopy last week where the go doctor found 4 ulcers he is on warfarin cuz of blood clots also he had cancer of the colon wher most of colon was removed Today he was going to the bathroom and he is getting long string type blood stool out should I take him to the emergency room or could we wait until Monday when he sees his doctor
[|AI|]  Thanks for your question on Chat Doctor. Since your son was on warfarin chances of altered coagulation profile are high as a cause of bloody stool. But at the same time we need to rule out recurrence of malignancy as he is having ulcers too. So you should definitely take him to the ER. Stop warfarin immediately.  Get done PT (Prothrombin Time) to see for any alteration in coagulation profile. Also get done colonoscopy to rule out recurrence of colon cancer. If PT is altered than he needs it k injection to stop the bleeding.