Background and Methods Conservative surgery and radiotherapyhave become well-established treatments for breast cancer, andmany trials in progress are attempting to define the most acceptabletype of procedure. Between 1987 and 1989 we randomly assigned567 women with small breast cancers (<2.5 cm in diameter)to quadrantectomy followed by radiotherapy or to quadrantectomywithout radiotherapy. All patients underwent total axillarydissection. The median follow-up period was 39 months (range,28 to 54).
Results The incidence of local recurrence was 8.8 percent amongthe patients treated with quadrantectomy without radiotherapy,as compared with 0.3 percent among those treated with postsurgicalradiotherapy (P = 0.001). However, there was a substantial effectof age: patients more than 55 years old who did not receiveradiotherapy had a low rate of local recurrence (3.8 percent).The four-year overall survival was similar in the two treatmentgroups.
Conclusions Administering radiotherapy after quadrantectomyreduces the risk of local recurrence in women with small cancersof the breast, but radiotherapy may not be necessary in elderlywomen.
Source Information
From the Istituto Nazionale per lo Studio e la Cura dei Tumori, Via G. Venezian 1, 20133 Milan, Italy, where reprint requests should be addressed to Dr. Veronesi.
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