RESUMO
During the course of four recent dose-intense chemotherapy trials, the routine practice of transfusing patients with platelet counts < 20,000/microliters was changed to a more conservative style of management limiting prophylactic transfusions to patients with platelet counts < 5000/microliters. One hundred seventy-nine episodes of thrombocytopenia in 46 patients enrolled in four dose-intense chemotherapy trials were evaluated. Thirty-two patients had advanced carcinoma of the ovary, 10 had pelvic sarcomas, and 4 had cervical cancer. Of the 179 episodes of thrombocytopenia evaluated, 100 exhibited severe thrombocytopenia (platelet count < 20,000/microliters). Of these 100 episodes, 30 received prophylactic platelet transfusions while 70 did not. Thirty-eight episodes of thrombocytopenia were 5000-10,000/microliters, 24 of which received prophylactic platelet transfusions while 14 did not. Eighteen episodes (10%) of thrombocytopenia resulted in minor bleeding and all occurred during severe thrombocytopenia. Minor bleeding occurred in 27% of episodes of severe thrombocytopenia receiving prophylactic platelet transfusions versus 14% not transfused (P = 0.2). Of the 38 episodes of thrombocytopenia 5000-10,000/microliters, minor bleeding occurred in 17% receiving prophylactic platelet transfusions versus 24% not transfused (P = 0.95). None of the 179 episodes of thrombocytopenia resulted in major bleeding, including 70 episodes of thrombocytopenia < 20,000/microliters not receiving prophylactic platelet transfusions which included 14 episodes of thrombocytopenia between 5000-10,000/microliters. In conclusion, in women with gynecologic cancer and chemotherapy-induced thrombocytopenia, we safely limited prophylactic platelet transfusions for episodes of thrombocytopenia < 5000/microliters. We hope our study will prompt prospective, randomized trials evaluating the need of prophylactic platelet transfusions for chemotherapy-induced thrombocytopenia in patients with solid tumors.
