A 56-year-old man during colonoscopy underwent extirpation of colon sigmoideum polypus. Polypus was localized 40 cm from margo ani. During hystological investigation there was found cancer on the apex of it, which infiltrates submucose tissue. In the basis of polypus no malignancy was found. Your tactics will be:
A. Telegamma therapy
B. Chemotherapy
C. Radical operative treatment
D. Dispanserization and control colonoscopy after each 3 months
E. Observation in policlinics
Answer: D. Dispanserization and control colonoscopy after each 3 months