Post-bevacizumab treatment and clinical outcomes in recurrent malignant glioma.

Authors

null

Yongjun Cha

Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea

Yongjun Cha , Yu Jung Kim , Tae Min Kim , Seung Hong Choi , Se-Hoon Lee , Dong-Wan Kim , Chul-Kee Park , Il Han Kim , Jee Hyun Kim , Eunhee Kim , Byung Se Choi , Chae-yong Kim , In Ah Kim , Dae Seog Heo

Organizations

Department of Internal Medicine, Seoul National University Hospital, Seoul, South Korea, Department of Internal Medicine, Seoul National Unversity Bundang Hospital, Seongnam, South Korea, Department of Radiology, Seoul National University Hospital, Seoul, South Korea, Department of Neurosurgery, Seoul National University Hospital, Seoul, South Korea, Department of Radiation Oncology, Seoul National University Hospital, Seoul, South Korea, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, South Korea, Department of Radiology, Seoul National University Bundang Hospital, Seongnam, South Korea, Department of Neurosurgery, Seoul National University Bundang Hospital, Seongnam, South Korea, Department of Radiation Oncology, Seoul National University Bundang Hospital, Seongnam, South Korea

Research Funding

No funding sources reported

Background: Bevacizumab (Bev) and irinotecan combination therapy is effective against recurrent malignant glioma. However, post-Bev treatment and its clinical outcomes are not well investigated. Methods: We identified 103 consecutive recurrent malignant glioma patients who received Bev plus irinotecan at our institutions.Clinical records and magnetic resonance images were reviewed. Response and progression were assessed by RANO criteria. Results: Bev and irinotecan treatment produced response rate of 37.9% (95% CI, 29.1-47.5%). At a median follow-up time of 41 weeks, the median progression-free survival (PFS) was 17.1 weeks (95% CI, 14.3-20.0), and 6-month PFS (6M-PFS) was 27.8% (95% CI, 18.4-37.2). The median overall survival (OS) was 33.4 weeks (95% CI, 27.8-39.1). Response predicted for superior PFS (25.0 weeks vs. 11.0 weeks, p < .001) and OS (45.9 weeks vs. 26.7 weeks, p < .001). A total of 93 patients discontinued Bev treatment and the reasons for discontinuation were: disease progression in 59 (63.4%), toxicities in 4 (4.3%), physician’s decision in 5 (5.4%), patient’s refusal to further treatment in 25 (26.9%). The median OS was 26.7 weeks in 59 patients who discontinued Bev due to disease progression, and 45.7 weeks in 34 patients who discontinued Bev for reasons other than disease progression (p < .001). Among 85 patients who progressed after Bev, 42 (49.4%) received further therapy: chemotherapy in 32 (37.6%), radiotherapy in 9 (10.6%), and surgery in 1 (1.2%). Further chemotherapy regimens included temozolomide (31.2%), ACNU/CDDP (25.0%), Bev reintroduction (18.8%), erlotinib (12.5%), PCV (9.4%), and intrathecal methotrexate (3.1%). The median survival time after Bev failure was 15.6 weeks (95% CI, 13.3-17.8). Patients who received further therapy showed longer median OS (18.6 weeks vs. 12.9 weeks, p < .001). In patients who received chemotherapy, the median PFS and OS was 6.6 weeks and 20.6 weeks, respectively. Conclusions: Prognosis after Bev failure was poor. Proper selection of patients who may benefit from further treatment is warranted.

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Abstract Details

Meeting

2013 ASCO Annual Meeting

Session Type

Poster Session

Session Title

Central Nervous System Tumors

Track

Central Nervous System Tumors

Sub Track

Central Nervous System Tumors

Citation

J Clin Oncol 31, 2013 (suppl; abstr 2098)

DOI

10.1200/jco.2013.31.15_suppl.2098

Abstract #

2098

Poster Bd #

8F

Abstract Disclosures