[Breast preserving therapy of breast carcinoma: analysis of over 1,300 patients treated in the Basel region].

From 1977 to 1994 a total of 1329 breast cancer patients have been treated with breast conserving surgery in the region of Basel. This analysis is based on 832 patients treated from 1977 to 1990 according to a prospective treatment protocol, which was adjusted only once (1985). In comparison with the most known international publications this analysis represents one of the greatest homogeneous series of breast conserving treatment. We observe an overall 5-year survival of 91% and a 10-year survival rate of 77%. 94% of the women remain locally recurrence free at 5 years and 86% at 10 years respectively. At 5 years, freedom of local recurrence totals to 97% in patients without (pN0) and to 89% in patients with tumor involvement of the axillary lymph nodes (pN+) (p = 0.00008), as well as to 96% for pT1 and 91% for pT2-tumors (p = 0.08328). In our analysis the R0-resection significantly influences local recurrence free survival.