Phase II study of bevacizumab in patients with platinum-resistant ovarian cancer or peritoneal serous cancer.

Abstract

PURPOSE We evaluated the efficacy and safety of bevacizumab in patients with platinum-resistant epithelial ovarian carcinoma (EOC) or peritoneal serous carcinoma (PSC) who had experienced disease progression during, or within 3 months of discontinuing, topotecan or liposomal doxorubicin. PATIENTS AND METHODS No more than three prior treatment regimens were allowed. Patients received single-agent bevacizumab 15 mg/kg intravenously every 3 weeks. Response was assessed by computed tomography (CT) scan every 6 weeks using Response Evaluation Criteria in Solid Tumors (RECIST). RESULTS Of 44 patients treated, 83.7% were primarily platinum resistant, 59.1% had received liposomal doxorubicin, 25% topotecan, 15.9% both agents, and 47.7% had received three prior chemotherapy regimens. A median of five (range, two to 16) bevacizumab doses were administered. Partial responses were observed in seven patients (15.9%). Median progression-free survival was 4.4 months (95% CI, 3.1 to 5.5 months), with a median survival duration of 10.7 months at study termination. Bevacizumab-associated grade 3 to 4 events included hypertension (9.1%), proteinuria (15.9%), bleeding (2.3%), and wound-healing complications (2.3%). The incidence of GI perforation (GIP; 11.4%) was higher than reported in bevacizumab trials of other tumor types. GIP occurred in 23.8% of patients receiving three prior chemotherapy regimens, compared with 0% of patients receiving two prior chemotherapy regimens (P < .01). A trend toward higher risk of GIP was observed for patients with bowel wall thickening or bowel obstruction on CT scan. Arterial thromboembolic events occurred in three patients (6.8%). Three deaths were related to bevacizumab treatment. CONCLUSION Bevacizumab has single-agent activity in patients with platinum-resistant EOC or PSC. A higher than expected incidence of GIP was noted in these heavily pretreated patients.

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@article{Cannistra2007PhaseIS, title={Phase II study of bevacizumab in patients with platinum-resistant ovarian cancer or peritoneal serous cancer.}, author={Stephen A. Cannistra and Ursula A. Matulonis and Richard Penson and Julie Hambleton and Jakob Dupont and Howard M Mackey and Jeffrey Douglas and Robert A. Burger and Deborah Armstrong and Robert Michael Wenham and William Patrick McGuire}, journal={Journal of clinical oncology : official journal of the American Society of Clinical Oncology}, year={2007}, volume={25 33}, pages={5180-6} }