Duke's classification

Duke's classification

Surgical oncology A system for staging colorectal carcinoma–which has been modified with time. See TNM classification. Duke's classification Stage Depth of invasion 5-year survival A Limited to mucosa 100.0% B1 Muscularis propria, negative nodes 66.4% B2 Penetrates muscularis propria, negative nodes 53.9% C1 Limited to wall, positive nodes 42.8% C2 Through wall, positive nodes 22.4% (D) Non-Duke's designation for distal metastases 3.0%