
The treatment of ovarian cancer is rapidly evolving. Current treatment of ovarian cancer depends on a number of factors, including the stage of the disease and the general health of the patient. Unfortunately, due to lack of effective detection tools and the fact that many women are asymptomatic, many will present with advanced-stage disease.
Therapy for advanced-stage ovarian cancer involves a number of surgical techniques. Typically, these surgical procedures include
- Hysterectomyremoval of the uterus
- Bilateral salpingo-oophorectomyremoval of both ovaries and fallopian tubes
- Cytoreduction (debulking)removal of as much of the tumor that has spread through the abdomen
Surgery is followed by platinum-based chemotherapy, and increasingly carboplatin, with or without a taxane, is used rather than cisplatin, since it has less toxicity and equivalent activity. [18] Though the initial response rates are 70% to 80%, which includes a good portion of complete responses, the majority of women will eventually relapse. [2]
Treatment of recurrent ovarian cancer
The interval between the completion of initial therapy and the relapse is key to determining appropriate therapy options. The disease relapse is typically broken into two groups:
- Platinum-sensitivedefined as disease that has relapsed or progressed after a treatment-free interval of >6 months
- Platinum-resistant/refractorydefined as disease that has progressed on therapy or after treatment-free interval of <6 months
Patients with platinum-sensitive disease who have had a significant response to cisplatin or carboplatin may again respond to treatment with one of these agents. Patients are typically either treated with the same drug or are alternated between cisplatin and carboplatin. [18] The likelihood that the patient will respond increases as the length of time since the patient was last treated increases. [24] Other agents used in patients with platinum-resistant/refractory disease may also be considered.
In patients with platinum-resistant/refractory disease whose disease progressed while on a platinum regimen or recurred shortly after regimen completion, there are a number of second-line agents available, including
- Paclitaxel
- Doxil® (doxorubicin HCl liposome injection)
- Hycamtin
Several studies have compared the various single agents as well as whether the use of combination therapy is superior to single agents. In addition, randomized trials have been performed to compare the different agents.
For more information, please visit the following sections on this site:
Or visit, the National Cancer Institutes Web site for more treatment information.
Disclaimer
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Important Safety Information
Indications
Hycamtin is indicated for the treatment of metastatic carcinoma of the ovary after failure of initial or subsequent chemotherapy.
Contraindications
Hycamtin is contraindicated in patients who have a history of hypersensitivity reactions to topotecan or to any of its ingredients. Hycamtin should not be used in patients who are pregnant or breast-feeding, or those with severe bone marrow depression.
Warnings
Hycamtin should be used only in patients with adequate bone marrow reserves, including baseline neutrophil counts of at least 1,500 cells/mm³ and platelet counts of at least 100,000/mm³. Frequent monitoring of blood counts should be instituted during treatment with Hycamtin.
Patients should not be treated with subsequent courses of Hycamtin until neutrophils recover to >1,000 cells/mm³, platelets recover to >100,000 cells/mm³, and hemoglobin levels recover to 9.0 g/dL (with transfusion if necessary). Severe myelotoxicity has been reported when 5-day dosing of Hycamtin is used in combination with cisplatin.
Hycamtin may cause fetal harm when administered to a pregnant woman. Women of childbearing potential should be advised to avoid becoming pregnant during therapy with Hycamtin.
Drug Interactions
Concomitant administration of G-CSF can prolong the duration of neutropenia, so if G-CSF is to be used, it should not be initiated until 24 hours after completion of treatment with Hycamtin.
Myelosuppression was more severe when Hycamtin, at a dose of 1.25 mg/m²/day x 5 days, was given in combination with cisplatin at a dose of 50 mg/m² in phase I studies. In one study, 1 of 3 patients had severe neutropenia for 12 days, and a second patient died with neutropenic sepsis.
Adverse Events
The most common serious adverse event is myelosuppression.
Severe neutropenia, the dose-limiting toxicity for Hycamtin, occurred in 78% of 879 ovarian and small cell lung cancer patients treated. Other hematologic adverse events reported include severe leukopenia (32%), severe thrombocytopenia (27%), and severe anemia (37%).
Frequently reported nonhematologic adverse events associated with use of Hycamtin included nausea (64%), vomiting (45%), diarrhea (32%), alopecia (49%), fatigue (29%), and dyspnea (22%). Most nonhematologic toxicities were grade 1 or 2.
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