Dr Aditya Reelkar is the Best Colorectal Cancer Surgeon in Dadar, Mahim West, Mahim and Mumbai. Colorectal cancer is a cancer that starts in the colon or rectum, often developing from pre-cancerous growths called polyps. Common symptoms include changes in bowel habits, blood in the stool, and abdominal discomfort, though early stages may have no symptoms at all. Treatment options include surgery, chemotherapy, and targeted therapies, and the cancer is often treatable and even curable, especially when detected early through screening, which most people should begin at age 45. What causes colorectal cancer? The exact cause of colorectal cancer is not known, but certain risk factors are strongly linked to the disease, including diet, tobacco smoking and heavy alcohol use. Also, people with certain hereditary cancer syndromes or a family history of colorectal cancer have a high risk of developing the disease.