Abstract:
BACKGROUND:In this prospective study, the authors evaluated potential treatment toxicity and progression-free survival in patients with low-grade glioma who received treatment with proton radiation therapy. METHODS:Twenty patients with World Health Organization grade 2 glioma who were eligible for radiation therapy were enrolled in a prospective, single-arm trial of proton therapy. The patients received proton therapy at a dose of 54 Gy (relative biological effectiveness) in 30 fractions. Comprehensive baseline and regular post-treatment evaluations of neurocognitive function, neuroendocrine function, and quality of life (QOL) were performed. RESULTS:All 20 patients (median age, 37.5 years) tolerated treatment without difficulty. The median follow-up after proton therapy was 5.1 years. At baseline, intellectual functioning was within the normal range for the group and remained stable over time. Visuospatial ability, attention/working memory, and executive functioning also were within normal limits; however, baseline neurocognitive impairments were observed in language, memory, and processing speed in 8 patients. There was no overall decline in cognitive functioning over time. New endocrine dysfunction was detected in 6 patients, and all but 1 had received direct irradiation of the hypothalamic-pituitary axis. QOL assessment revealed no changes over time. The progression-free survival rate at 3 years was 85%, but it dropped to 40% at 5 years. CONCLUSIONS:Patients with low-grade glioma tolerate proton therapy well, and a subset develops neuroendocrine deficiencies. There is no evidence for overall decline in cognitive function or QOL.
journal_name
Cancerjournal_title
Cancerauthors
Shih HA,Sherman JC,Nachtigall LB,Colvin MK,Fullerton BC,Daartz J,Winrich BK,Batchelor TT,Thornton LT,Mancuso SM,Saums MK,Oh KS,Curry WT,Loeffler JS,Yeap BYdoi
10.1002/cncr.29237subject
Has Abstractpub_date
2015-05-15 00:00:00pages
1712-9issue
10eissn
0008-543Xissn
1097-0142journal_volume
121pub_type
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