Value of screening endoscopy in evaluation of esophageal, gastric and colon cancers

Table 6 Colorectal cancer screening guidelines for the United States

Guidelines for screening for the early detection of colorectal cancer and adenomas for average-risk women and men aged 50 yr and older
Test	Interval
Tests that detect adenomatous polyps and cancer
FSIG with insertion up to 40 cm from anal verge or to splenic flexure	Every 5 yr
Colonoscopy	Every 10 yr
DCBE	Every 5 yr
CTC	Every 5 yr
Tests that primarily detect cancer
gFOBT	Annual
FIT	Annual
sDNA	Interval uncertain

Adapted from Levin et al[59]. FSIG: Flexible sigmoidoscopy; DCBE: Double-contrast barium enema; CTC: Computed tomography colonography; gFOBT: Guaiac-based fecal occult blood test; FIT: Fecal immunochemical test; sDNA: Stool DNA test.