[Colonic cancer screening with KRYPTO-HAEM SSW. The results in 3015 persons]

In a factory 3015 individuals have been tested for occult blood in stool using the KRYPTO-HAEM SSW. Test results were positive in 100 individuals (3.3%). Subsequent investigations have revealed 6 carcinomas of the colon, one carcinoid in the cecum and adenomas in 9 cases. Eleven out of the 16 tumors detected were beyond the range of the rectoscope. The test was valued as false-positive in 42 individuals (1.4%). A cecum carcinoma and 5 adenomas were revealed by false-negative findings. The importance of case history and exact diagnostic clarification of a positive test is pointed out. The inclusion of the KRYPTO-HAEM test into basic medical care proved to be an adequate measure for early detection of colorectal tumors.