Negative Haemoccult® Test in Malignant and Premalignant Lesions of the Colon

Summary To date, no published report on a trial has provided sufficiently strong evidence of the accuracy of the Haemoccult ® Test assessed by false-negative error, and validated on the basis of a complete colonoscopy of all patients. Total colonoscopy (up to the cecum) was performed on 534 patients whose stools had been tested for occult blood. The results of the colonoscopy were classified as follows: expected continual bleeding (target lesions: carcinoma, polyps ≥ 10 mm) intermittant bleeding (polyps