Journal
JOURNAL OF NEURO-ONCOLOGY
Volume 137, Issue 2, Pages 429-438Publisher
SPRINGER
DOI: 10.1007/s11060-017-2735-y
Keywords
Glioblastoma; Intensity-modulated radiation therapy; 3D conformational radiation therapy; Dosimetric outcomes; Clinical outcomes
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We aimed to compare three-dimensional conformal radiotherapy (3D-CRT) with intensity-modulated radiotherapy (IMRT) for the treatment of glioblastoma. Retrospective study of 220 patients with glioblastoma, treated with 3D-CRT or IMRT, with or without surgery. Dosimetric parameters as well as clinical and survival data for the two techniques were analyzed and compared. The median conformity index was 1.53 (range 0-2.69) for 3D-CRT and 1.25 (range 0.97-2.01) for IMRT, p < 10(-4). The median homogeneity index was 0.10 (range 0.03-0.32) for 3D-CRT and 0.07 (range 0.03-0.18) for IMRT, p < 10(-4). There were significantly fewer acute grade 1 and 2 neurological toxicities in the IMRT group especially for edema (1.3 versus 12.4%, p = 0.017), concentration disorders (6.6 versus 19.9%, p = 0.003) and consciousness disorders (2.6 versus 13.2%, p = 0.002) although IMRT patients had a significantly worse pre-treatment neurological status than 3D-CRT patients. Median survival was 16.0 months (range 11.9-17.8) for IMRT and 13.4 months (range 11.7-15.7) for 3D-CRT patients (p = 0.542). IMRT improved target conformity and reduced neurological toxicities for patients with glioblastomas.
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