Stage

Classification

Anatomy

% Patients at Diagnosis

% 5-Yr. Relative Survival

Treatment

Early

Dukes' A

Confined to colon surface lining

11%

83%

Surgery Only

Dukes' B

Below the surface; no lymph node involvement

35%

64%

Late

Dukes' C

Lymph node involvement

26%

38%

Surgery & Chemotherapy

Dukes' D

Metastatic disease

29%

3%