• Colon and Rectal Cancers - Risk Factors
• Highlights
• Introduction
• Causes
• Risk Factors and Prevention
• Diagnosis and Screening
• Treatment

Symptoms

It is common to have colon or rectal cancer without symptoms. Many patients are free of symptoms until their tumors are quite advanced.

Symptoms associated with colorectal cancer may also be caused by other conditions. These symptoms include:

• Changes in bowel movements, such as diarrhea or constipation, or change in consistency or size of stools
• Feeling that the bowel has not emptied completely after a bowel movement
• Abdominal discomfort such as gas, bloating, and cramps
• Rectal bleeding or...