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The Will Rogers phenomenon in the staging of breast cancer - does it matter?
G H Tan1, N Bhoo-Pathy2, N A Taib1
1Department of Surgery, University Malaya Medical Center, 50603 Kuala Lumpur, Malaysia.
Introduction:
Changes in the American Joint Commission on Cancer staging for breast cancer occurred when the 5th Edition was updated to the 6th Edition.
Objective:
To investigate how these changes affected stage and survival.
Methods:
3127 cases of breast cancer were restaged.
Results:
Late stages increased from 27.7% to 38.1%. The five-year survival improved in Stage 2 (82.9-86.1%) and Stage 3 (50.6-59%).
Discussion:
Stage shift leads to an erroneous impression that women are presenting with later stages and stage-specific survival is improving.
Conclusion:
Standardizing cancer staging is important when reporting stage and survival in different time periods.
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