Rectal cancer has a much higher rate of local recurrence than colon cancer. Close follow-up may lead to the earlier diagnosis of recurrent disease and improved treatment. After treatment for rectal cancer, follow-up should include:
• Physical examination every two to three months for at least five years.
• Chest x-ray every 6 to 12 months for three to five years.
• Abdominal and pelvic CT scans twice a year for one to two years, then yearly.
• Serum chemistry profiles every 6 to 12 weeks
• Barium enema as required. 
• Sigmoidoscopic examinations every three to six months and yearly colonoscopy .