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  • Title: Chemotherapy in advanced ovarian carcinoma: current standards of care based on randomized trials.
    Author: Thigpen T, Vance R, Puneky L, Khansur T.
    Journal: Gynecol Oncol; 1994 Dec; 55(3 Pt 2):S97-107. PubMed ID: 7835816.
    Abstract:
    The mainstay of the treatment of advanced (stage III or IV) ovarian carcinoma is systemic therapy. The following review bases conclusions regarding standards of care on large, randomized trials of chemotherapy in advanced ovarian carcinoma. As of 1976, "standard" chemotherapy was single alkylating agent usually with melphalan. Studies of combination chemotherapy failed to show superiority over single alkylating agent until the introduction of cisplatin. The Gynecologic Oncology Group conducted a series of two trials in patients with large-volume disease, the first randomizing patients to either single-agent melphalan or a combination of doxorubicin and cyclophosphamide and the second to doxorubicin plus cyclophosphamide with or without cisplatin. These studies demonstrated superiority for the cisplatin-based combination in terms of overall response rate, clinical complete response rate, progression-free survival, and overall survival. Subsequent randomized trials demonstrated several important facts. First, platinum-based combinations yielded results superior to single-agent cisplatin. Second, a two-drug combination of cisplatin plus cyclophosphamide provides benefit equivalent to the three-drug combination of the same two drugs plus doxorubicin. Third, substitution of carboplatin for cisplatin yields similar results. Finally, dose escalation of chemotherapy by a factor of 2 does not offer a therapeutic advantage. The next major advance after the introduction of the platinum compounds was the demonstration of the activity of taxol, a new agent with a unique mechanism of action and apparent clinical non-cross-resistance with the platinum compounds. A recently completed GOG trial of cisplatin plus cyclophosphamide versus cisplatin plus taxol in patients with large-volume disease shows that the taxol-based combination has a superior overall response rate, clinical complete response rate, rate of achieving a state of no gross residual disease at second-look laparotomy, and progression-free survival. Survival analysis awaits maturation of the data, but the control arm has already been shown to have a median survival of 23.2 months with the median not yet reached for the taxol-based arm. These data suggest that a combination of taxol plus cisplatin should be considered the standard of care for patients with advanced ovarian carcinoma. Ongoing trials seek to define further the role of taxol in frontline chemotherapy for ovarian carcinoma. In conclusion, the standard chemotherapy for advanced ovarian carcinoma should be considered a combination of taxol plus a platinum compound.
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