Select pathological finding to visualize Dukes stage.
Guidelines & Evidence
Clinical Details
Section 1
When to Use
When to Use
Historical reporting of colorectal cancer staging before the ubiquitous adoption of TNM
To understand archival clinical trials and survival data from the mid-20th century
Quick bedside shorthand for general cancer burden
Staging Context
The Dukes system (1932) was the first successful attempt to correlate the depth of surgical invasion and nodal status with 5-year survival. While largely superseded by AJCC TNM, it remains a common "shortcut" terminlogy in pathology reports.
Section 2
Formula & Logic
The 4 Historical Stages
01
Dukes A: Limited to the bowel wall (T1/T2, N0).
02
Dukes B: Penetration through the bowel wall into the subserosa or mesentery (T3/T4, N0).
Dukes D: Distant metastasis (M1). (Note: Added in later modifications; not in original 1932 set).
5-Year Survival Estimates (Historical)
Dukes A
> 90%
Dukes B
70–80%
Dukes C
30–50%
Dukes D
< 5%
Section 3
Pearls/Pitfalls
Transition to TNM
The primary limitation of Dukes was its inability to distinguish between different "T" depths within a stage. For instance, a T3 N0 lesion (B) has a different prognosis than a T4 N0 lesion (also B). TNM (AJCC) provides this necessary granularity.
Dukes B1 vs B2 (Astler-Coller)
The Astler-Coller modification refined Dukes B into B1 (limited to muscularis propria) and B2 (penetrating through), further improving the correlation with longitudinal survival.
Section 4
Next Steps
Modern Equivalents
01
Dukes A → AJCC Stage I.
02
Dukes B → AJCC Stage II.
03
Dukes C → AJCC Stage III.
Complementary Staging Tools
Colorectal Cancer TNM Staging (AJCC 8th)
Paris Classification (Morphology)
CEA Screening Guidelines
Section 5
Evidence Appraisal
The Original Staging
The classification of cancer of the rectum.
Dukes CE. • The Journal of Pathology and Bacteriology. 1932;35(3):323-32. The foundational paper that defined oncology for decades.
Dr. Cuthbert Dukes was a British pathologist at St Mark's Hospital, London. His work established that the "natural history" of cancer could be scientifically structured by looking at how deep it grew and whether it had reached the "glands" (nodes). St Mark's Hospital remains a world leader in colorectal surgery today.
