Brown J, Brady WE, Schink J, Van Le L, Leitao M, Yamada SD, de Geest K, Gershenson DM. Efficacy and safety of bevacizumab in recurrent sex cord-stromal ovarian tumors: results of a phase 2 trial of the Gynecologic Oncology Group.
Cancer 2013;
120:344-51. [PMID:
24166194 DOI:
10.1002/cncr.28421]
[Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 08/15/2013] [Accepted: 08/22/2013] [Indexed: 11/07/2022]
Abstract
BACKGROUND
The Gynecologic Oncology Group conducted this phase 2 trial to estimate the antitumor activity of bevacizumab and to determine the nature and degree of toxicity in patients with recurrent sex cord-stromal tumors of the ovary.
METHODS
A prospective, multi-institutional cooperative group trial was performed in women with recurrent, measurable ovarian stromal tumors. Patients were allowed to have unlimited prior therapy, excluding bevacizumab. Bevacizumab 15 mg/kg was administered intravenously on day 1 of every 21-day cycle until patients developed disease progression or adverse effects that prohibited further treatment. The primary endpoint was the response rate (RR). Inhibin A and B levels were measured before each cycle, and the values were examined in relation to response and progression.
RESULTS
Thirty-six patients were enrolled, and all were eligible and evaluable. Patients received a median of 9 cycles of treatment (range, 2-37 cycles). Six patients (16.7%) had partial responses (90% confidence interval, 7.5%-30.3%), 28 patients (77.8%) had stable disease, and 2 patients (5.6%) had progressive disease. This met the criterion for declaring the regimen active. The median progression-free survival was 9.3 months, and the median overall survival was not reached in during reporting period. Two grade 4 toxicities occurred, including hypertension and proteinuria; and the most common grade 3 toxicities were hypertension (n = 5) and pain (n = 5). Inhibin A and B values were lower in patients who responded to treatment.
CONCLUSIONS
Bevacizumab has activity in the treatment of recurrent sex cord-stromal tumors of the ovary, and its toxicity is acceptable. Further investigation is warranted.
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