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Reirradiation in progressive high-grade gliomas: outcome, role of concurrent chemotherapy, prognostic factors and validation of a new prognostic score with an independent patient cohort.
- Source :
-
Radiation oncology (London, England) [Radiat Oncol] 2013 Jul 03; Vol. 8, pp. 161. Date of Electronic Publication: 2013 Jul 03. - Publication Year :
- 2013
-
Abstract
- Purposes: First, to evaluate outcome, the benefit of concurrent chemotherapy and prognostic factors in a cohort of sixty-four high-grade glioma patients who underwent a second course of radiation therapy at progression. Second, to validate a new prognostic score for overall survival after reirradiation of progressive gliomas with an independent patient cohort.<br />Patients and Methods: All patients underwent fractionated reirradiation with a median physical dose of 36 Gy. Median planned target volume was 110.4 ml. Thirty-six patients received concurrent chemotherapy consisting in 24/36 cases (67%) of carboplatin and etoposide and in 12/36 cases (33%) of temozolomide. We used the Kaplan Meier method, log rank test and proportional hazards regression analysis for statistical assessment.<br />Results: Median overall survival from the start of reirradiation was 7.7 ± 0.7 months. Overall survival rates at 6 and 12 months were 60 ± 6% and 24 ± 6%, respectively. Despite relatively large target volumes we did not observe any major acute toxicity. Concurrent chemotherapy did not appear to improve outcome. In contrast, female gender, young age, WHO grade III histology, favorable Karnofsky performance score and complete resection of the tumor prior to reirradiation were identified as positive prognostic factors for overall survival. We finally validated a recent suggestion for a prognostic score with our independent but small patient cohort. Our preliminary findings suggest that its ability to discriminate between different prognostic groups is limited.<br />Conclusions: Outcome of our patients was comparable to previous studies. Even in case of large target volumes reirradiation seems to be feasible without observing major toxicity. The benefit of concurrent chemotherapy is still elusive. A reassessment of the prognostic score, tested in this study, using a larger patient cohort is needed.
- Subjects :
- Adult
Aged
Aged, 80 and over
Brain Neoplasms mortality
Brain Neoplasms pathology
Chemoradiotherapy
Cohort Studies
Female
Glioma mortality
Glioma pathology
Humans
Kaplan-Meier Estimate
Male
Middle Aged
Neoplasm Grading
Neoplasm Recurrence, Local mortality
Neoplasm Recurrence, Local pathology
Prognosis
Proportional Hazards Models
Salvage Therapy methods
Treatment Outcome
Young Adult
Brain Neoplasms therapy
Glioma therapy
Neoplasm Recurrence, Local radiotherapy
Subjects
Details
- Language :
- English
- ISSN :
- 1748-717X
- Volume :
- 8
- Database :
- MEDLINE
- Journal :
- Radiation oncology (London, England)
- Publication Type :
- Academic Journal
- Accession number :
- 23822643
- Full Text :
- https://doi.org/10.1186/1748-717X-8-161