Abstract
Immunological fecal occult blood test was evaluated in a test positive group (A) and non-test group (B) between January in 1992 and May in 1993. Colon diseases were diagnosed 74 of 115 patients (64.3%) in group A and 159 of 334 patients (47.7%) in group B. Colon cancer was found 4 patients in group A and 3 in group B. The immunological fecal occult blood test was useful in both mass screening and clinical diagnosis.