The idea of undergoing a colonoscopy can be daunting, but it is one of the tools we have for picking up colorectal cancer early, as the disease often has no symptoms in the early stages. So how often should you have a colonoscopy? How do you know if you need one? And is that the only screening option for colorectal cancer? Find out from Dato’ Dr Meheshinder Singh, consultant colorectal surgeon from Pantai Hospital Kuala Lumpur.