CRP is a marker of inflammation. Increase may be due to lot of non specific causes. Simply based on CRP report nothing can be commented on diagnosis like cancer. What make you think about possibility of colon cancer
is not clear to me. Any gastrointestinal cancer
may have vague upper G-I symptoms. In case of suspicion upper G-I endoscopy
may be ordered but that depends on your detailed clinical history. Consult your physician.