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Table 3 Most advanced lesions Identified by screening

From: Comparison between an immunochemical fecal occult blood test and a Guaiac based fecal occult blood test in detection of adenomas and colorectal cancer

  G-FOBT (%) I-FOBT (%)
Colonoscopies Findings
 Normal 4 (22.2) 19 (24.6)
 Benign lesions 4 (22.2) 22 (28.6)
 Nonadvanced adenomas 4 (22.2) 20 (26.0)
 Advanced adenomas 4 (22.2) 11 (14.3)
 Invasive Colorectal Cancer 2 (11.1) 5 (6.5)
Total 18 (100.0) 77 (100.0)
Adenomas characteristics
Histology
 LGD: Tubular 5 (62.5) 24 (77.4)
 LGD: Tubulovillous or villous 3 (37.5) 7 (22.6)
Total 8 (100.0) 31 (100.0)
Size
 ≤ 5 mm 2 (25.0) 7 (22.6)
 6-9 mm 4 (50.0) 13 (41.9)
 ≥ 10 mm 2 (25.0) 11 (35.5)
Total 8 (100.0) 31 (100.0)
Number
 < 3 7 (87.5) 22 (70.9)
 ≥ 3 1 (12.5) 9 (29.1)
Total 8 (100.0) 31 (100.0)
Invasive carcinoma stages
 Stage 1 1 (50.0) 4 (80.0)
 Stage 2 1 (50.0) 1 (20.0)
 Stage 3 0 0
Total 2 (100.0) 5 (100.0)