One of the many things that makes this cancer so hard to diagnose is the fact that there are not very many symptoms, but some patients complained of abdominal pain, blood clots, dark urine, light stool, loss of appetite. Once the cancer spreads more you start to see more symptoms like yellowing of skin, itchy skin, bloating. After people start to see more symptoms like they they go to the doctors, at that point the cancer has spread too much and it's usually too late.