| Fecal occult blood test |
Stool sample is checked for blood |
Every year after age 50 |
| Digital rectal exam |
Rectum is examined for abnormalities |
Done at checkups (about every five years after age 50) |
| Sigmoidoscopy |
The rectum and lower colon are examined |
Every five years after age 50 |
| Colonoscopy |
The colon is examined using a thin tube with a camera attached to it |
Every 10 years after age 50 |
| Double Contrast Barium Enema |
The patient is given an enema of barium so the colon and rectum can be easily viewed on x-rays |
Every five years after age 50 |