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The thrombogenic effect of anticancer drug therapy in women with stage II breast cancer.
Thromboembolic disease has long been recognized as a complication of cancer. Recent reports have suggested that drugs used in the treatment of cancer, including chemotherapeutic agents and hormones, may contribute to this risk, but it has not been possible to separate the effect of these drugs from that of the cancer. We performed a randomized trial comparing 12 weeks of chemohormonal therapy (using cyclophosphamide, methotrexate, fluorouracil, vincristine, prednisone, doxorubicin, and tamoxifen) with 36 weeks of chemotherapy (using cyclophosphamide, methotrexate, fluorouracil, vincristine, and prednisone) in patients with Stage II breast cancer. Among 205 patients randomly assigned to treatment, there were 14 episodes of thrombosis (6.8 percent). These 14 episodes occurred during 979 patient-months of chemotherapy; by comparison, there were no events during 2413 patient-months without therapy. During the first 12 weeks of the study, five patients in the 12-week group and four patients in the 36-week group had thrombosis. During the subsequent 24 weeks, when only patients in the 36-week group were still receiving chemotherapy, there was no thrombosis in the 12-week group, but there were five additional events in the 36-week group (P = 0.03). These findings suggest that chemotherapy contributes to thrombosis in patients with breast cancer.[1]References
- The thrombogenic effect of anticancer drug therapy in women with stage II breast cancer. Levine, M.N., Gent, M., Hirsh, J., Arnold, A., Goodyear, M.D., Hryniuk, W., De Pauw, S. N. Engl. J. Med. (1988) [Pubmed]
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