Tumor Shrinkage and Ki67 Reduction in Breast Cancer After Chemotherapy
Author Information
Author(s): Bottini A, Berruti A, Bersiga A, Brizzi M P, Bruzzi P, Aguggini S, Brunelli A, Bolsi G, Allevi G, Generali D, Betri E, Bertoli G, Alquati P, Dogliotti L
Primary Institution: Centro di Senologia, Servizio di Anatomia Patologica, Azienda Ospedaliera Istituti Ospitalieri
Hypothesis
The study investigates the relationship between tumor shrinkage and reduction in Ki67 expression after primary chemotherapy in breast cancer patients.
Conclusion
Chemotherapy induces tumor shrinkage and reduces cell cycle activity, but its impact on tumor biology is minimal.
Supporting Evidence
- Tumor shrinkage of >50% occurred in 72.4% of patients.
- Ki67 expression significantly decreased after chemotherapy.
- Reduction in Ki67 correlated with clinical response.
- Ki67 at residual tumor was a better predictor for relapse-free survival than baseline Ki67.
Takeaway
The study found that chemotherapy can shrink tumors and lower the number of active cells, but it doesn't change how aggressive the cancer is very much.
Methodology
Patients received primary chemotherapy and tumor specimens were evaluated for Ki67 and other markers before and after treatment.
Participant Demographics
Patients had T2-4, N0-1, M0 breast cancer.
Statistical Information
P-Value
P < 0.005
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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