BACKGROUND: The objective of the current study was to analyze the impact of adjuvant chemotherapy in comparison with other prognostic parameters on the outcome of a series of patients with breast carcinoma at time of metastatic recurrence. METHODS: Data from 1430 patients accrued in 8 prospective trials of anthracycline-based first-line chemotherapy conducted at the Institut Curie between 1977 and 1992 were reviewed. RESULTS: Patients who had not received adjuvant chemotherapy had better response rates (66%) than pretreated patients (56%; P < 0.0001). Median overall survival rates after metastatic recurrence were 26 months compared with 19 months, respectively (P < 0.0001). Local and regional recurrences as well as the number of organ sites involved with metastatic disease were reduced in patients who had received adjuvant chemotherapy. In a multivariate analysis, the following parameters if present at the initiation of treatment were associated with poor outcome: elevated lactico dehydrogenase (LDH), low Karnofsky index, short disease free interval, more than two involved sites, liver involvement, and prior adjuvant chemotherapy. This adverse prognostic effect of prior adjuvant chemotherapy was independent of the type of drugs and of the duration of the treatment and was present even in the subgroup patients with prolonged disease free intervals longer than 48 months. CONCLUSIONS: Adjuvant chemotherapy adversely affects overall response rates and overall survival rates in patients with metastatic breast carcinoma treated with first-line anthracycline based chemotherapy. Copyright 2001 American Cancer Society.
BACKGROUND: The objective of the current study was to analyze the impact of adjuvant chemotherapy in comparison with other prognostic parameters on the outcome of a series of patients with breast carcinoma at time of metastatic recurrence. METHODS: Data from 1430 patients accrued in 8 prospective trials of anthracycline-based first-line chemotherapy conducted at the Institut Curie between 1977 and 1992 were reviewed. RESULTS:Patients who had not received adjuvant chemotherapy had better response rates (66%) than pretreated patients (56%; P < 0.0001). Median overall survival rates after metastatic recurrence were 26 months compared with 19 months, respectively (P < 0.0001). Local and regional recurrences as well as the number of organ sites involved with metastatic disease were reduced in patients who had received adjuvant chemotherapy. In a multivariate analysis, the following parameters if present at the initiation of treatment were associated with poor outcome: elevated lactico dehydrogenase (LDH), low Karnofsky index, short disease free interval, more than two involved sites, liver involvement, and prior adjuvant chemotherapy. This adverse prognostic effect of prior adjuvant chemotherapy was independent of the type of drugs and of the duration of the treatment and was present even in the subgroup patients with prolonged disease free intervals longer than 48 months. CONCLUSIONS: Adjuvant chemotherapy adversely affects overall response rates and overall survival rates in patients with metastatic breast carcinoma treated with first-line anthracycline based chemotherapy. Copyright 2001 American Cancer Society.
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