Survival of patients with metastatic breast cancer treated with either combination or sequential chemotherapy.

One hundred twenty-one patients with metastatic adenocarcinoma of the breast were randomized to concurrent combination therapy or single-drug chemotherapy administered sequentially. Although response frequency and duration of response were significantly increased in patients receiving the combination regimen, survival was not significantly prolonged when compared to those receiving sequential treatment. For the 69 patients free of liver metastasis, median survival was comparable in both treatment arms (14.4 months sequential versus 12.8 months combination). These results indicate that a large subset of patients with metastatic breast cancer may benefit from less aggressive therapeutic regimens. Furthermore, these results illustrate that conclusions of chemotherapy trials in breast cancer based only on response frequency and duration of response represent preliminary results subject to change when final survival information becomes available.