<s>[INST] My brother has an ostomy and recently has noticed kidney bean like objects in stool but hasn t eaten them. He has had colorectal cancer and it passed to liver and has had two additional liver tumors and currently having chemo. What could those kidney bean objects be? [/INST] Hello and welcome to Chat Doctor. As a specialist. I can fully understand your concern. Operated colorectal cancer with stoma and liver metastasis, is stage 4 cancer.(advanced cancer). He shouldn't be worried about the undigested food, coming in the form of bean shaped particles. He should complete the chemotherapy as advised, to improve the QOL.(quality of life). If he sees blood, has jaundice, has nausea or omitting, he should report to doctor at once. Also repeat blood tests as advised. Chat Doctor.  Manga. </s>