Duke's classificationSurgical oncology A system for staging colorectal carcinoma–which has been modified with time. See TNM 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%
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.