For some, a colon cancer diagnosis comes after months of trying to pinpoint the cause of various symptoms. Others receive a surprise diagnosis after a routine colonoscopy. Although there are many ways to arrive at a colon cancer diagnosis, they all have one thing in common: laboratory analysis of a tissue sample that confirms the presence of cancer.
Most people who develop colon cancer never show any signs of the disease. This is because early stage tumors seldom cause any symptoms. Someone who receives a late stage colon cancer diagnosis is more likely to have experienced one or more symptoms associated with colon cancer, like stomach cramping or unexplained weight loss.