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DNA analysis in advanced breast cancer
M Leivonen1, L Krogerus, S Nordling
1Department of Surgery, Peijas Hospital, Vantaa, Finland.
Cancer Detection and Prevention
|January 1, 1994
Summary
DNA flow cytometry, including DNA index and S-phase fraction (SPF), has limited value for predicting prognosis in advanced breast cancer patients with metastases or recurrence. Low SPF in early stages showed better survival, but overall, these markers did not improve outcome prediction.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- DNA flow cytometry is a standard tool for assessing breast cancer aggressiveness during primary treatment.
- Its prognostic utility in advanced breast cancer, specifically with metastases or recurrence, remains less clear.
- Understanding prognostic markers is crucial for tailoring treatment strategies in advanced disease.
Purpose of the Study:
- To investigate the role of DNA flow cytometry parameters (DNA index, S-phase fraction, ploidy) in predicting prognosis for breast cancer patients with metastases or recurrence.
- To evaluate the correlation between these DNA markers in primary tumors versus metastases/recurrences and patient outcomes.
- To determine if DNA flow cytometry can refine prognostic assessments in advanced breast cancer.
Main Methods:
- Retrospective analysis of 132 breast cancer patients with documented metastases or recurrence.
- DNA flow cytometry performed on 96 primary tumors and 53 metastases/recurrences.
- Analysis included DNA index, S-phase fraction (SPF), and ploidy, correlated with clinical outcomes (disease-free interval, survival).
Main Results:
- Mean DNA index was 1.4, mean SPF was 9.4%, and 36.5% of tumors were diploid.
- SPF was significantly higher in stage III than stage IV; no significant differences in DNA index or SPF between primary tumors and metastases.
- In early stages (I-II), low SPF and diploid tumors with low SPF correlated with higher survival, but overall, DNA markers did not consistently predict prognosis or relapse patterns.
Conclusions:
- DNA flow cytometry parameters (DNA index, SPF, ploidy) show limited value in predicting prognosis for breast cancer patients with metastases or recurrence.
- While low SPF may indicate better survival in early-stage disease, combinations of these markers did not improve prognostic accuracy in advanced stages.
- Further research may be needed to identify more reliable prognostic indicators for advanced breast cancer.