Symptoms associated with diseases of the colon include bloody stool or changes in its consistency, rectal bleeding or changed bowel habits such as constipation or diarrhea, all of which may signal cancer, according to Mayo Clinic. These symptoms can also indicate colon polyps, colitis and diverticular disease, notes Cleveland Clinic.
Continued abdominal cramping, pain, gas and urgency are symptoms of colon-related diseases, including irritable bowel syndrome and a type of colitis called Crohn's disease, notes Clevland Clinic. People who have these symptoms should seek medical attention. The colon, about 5 feet long, is part of the large bowel. The colon receives liquid stool and converts it to solid stool for removal through the rectum and anus.