Experimental colonic tumours in the rat. II

Experimentally induced tumours in the colon of the rats were examined with a double contrast method. Carcinogenic agents were adminstered to 114 rats. The development of the colonic tumours was recorded by repeated examinations. In the dead rats a through necropsy was performed. The radiographic and microscopic results were correlated and the radiographic appearences of colonic tumours were evaluated. The diagnostic accuracy of the radiographic method in distinguishing between benign and malignant lesions was 92 per cent. (Auth.)