[Efficacy of diagnostic measures in colonic carcinoma]

It has been tried to ascertain the comparative value of the different diagnostic measures with regard to colorectal cancer. On the basis of the results achieved, the addition of the Hämoccult test (if this has not yet been done), of the rectoscopy and of endoscopic polypectomy to the programme of preventive medicine is indicated. Also measures for an early diagnosis of the post-operative recurrence of tumors are advisable.