Test/procedure

ASCRS

ASCO

NCCN

History and physical

Minimum of three times per year for the first 2 years

Every 3–6 months for 3 years, then every 6 months during years 4 and 5, then per physician discretion

Every 3–6 months for 2 years, then every 6 months for 5 years

CEA

Minimum of three times per year for the first 2 years

Every 3 months for 3 years or longer, for patients with Stage II or III disease

Every 3–6 months for 2 years, then every 6 months for 5 years for T2 or greater

Flexible sigmoidoscopy or proctoscopy for rectal cancer patients

Periodic anastomotic evaluation is recommended for patients who have undergone resection/anastomosis or local excision of rectal cancer

Every 6 months for 5 years for patients who have not received pelvic irradiation

Consider proctoscopy every 6 months for 5 years