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Manchester regional breast study. Preliminary results
Lancet (London, England)
|April 8, 1978
Summary
Early breast cancer patients receiving postoperative radiotherapy after simple mastectomy showed reduced local recurrence but no survival benefit. Radical mastectomy did not improve outcomes over simple mastectomy plus radiotherapy for stage II disease.
Area of Science:
- Oncology
- Surgical Oncology
- Radiotherapy
Background:
- Early breast cancer management has evolved significantly.
- Optimizing treatment to reduce recurrence while preserving survival is crucial.
Purpose of the Study:
- To evaluate the efficacy of postoperative radiotherapy in early breast cancer.
- To compare simple mastectomy with postoperative radiotherapy versus simple mastectomy alone for stage I breast cancer.
- To compare simple mastectomy with postoperative radiotherapy versus radical mastectomy alone for stage II breast cancer.
Main Methods:
- Prospective clinical trial involving 1020 early breast cancer patients (1970-1975).
- Stage I: Simple mastectomy + radiotherapy vs. simple mastectomy alone.
- Stage II: Simple mastectomy + radiotherapy vs. radical mastectomy alone.
- Follow-up of 2-7 years.
Main Results:
- Stage I: No significant difference in overall survival or distant metastasis-free survival.
- Stage I: Significant reduction in local recurrence with early postoperative radiotherapy.
- Stage II: No significant difference in survival, local recurrence, or distant metastases between treatment groups.
Conclusions:
- Early postoperative radiotherapy reduces local recurrence in stage I breast cancer after simple mastectomy.
- For stage II breast cancer, simple mastectomy with postoperative radiotherapy is comparable to radical mastectomy in terms of survival and recurrence.
- The findings support the use of radiotherapy to improve local control in early breast cancer.