Fecal cytology in conjunction with immunofecal occult blood test for colorectal cancer screening.

Objective: To develop a simple method to extract and analyze the cytomorphology of epithelial cells from fecal samples and to compare the efficacy of fecal cytology with the immunofecal occult blood test (IFOBT) in colorectal cancer screening.

Study Design: Fecal cytology and IFOBT were performed on fecal samples obtained from 41 patients with colorectal cancer; 34 patients with a small, single adenoma (<0.5 cm); and 20 without abnormality.