Abstract
Whole brain radiotherapy (WBRT) is associated with memory dysfunction. As part of NRG Oncology RTOG 0933, a phase II study of WBRT for brain metastases that conformally avoided the hippocampal stem cell compartment (HA-WBRT), memory was assessed pre- and post-HA-WBRT using both traditional and computerized memory tests. We examined whether the computerized tests yielded similar findings and might serve as possible alternatives for assessment of memory in multi-institution clinical trials. Adult patients with brain metastases received HA-WBRT to 30 Gy in ten fractions and completed Hopkins Verbal Learning Test-Revised (HVLT-R), CogState International Shopping List Test (ISLT) and One Card Learning Test (OCLT), at baseline, 2 and 4 months. Tests’ completion rates were 52–53 % at 2 months and 34–42 % at 4 months. All baseline correlations between HVLT-R and CogState tests were significant (p ≤ 0.003). At baseline, both CogState tests and one component of HVLT-R differentiated those who were alive at 6 months and those who had died (p ≤ 0.01). At 4 months, mean relative decline was 7.0 % for HVLT-R Delayed Recall and 18.0 % for ISLT Delayed Recall. OCLT showed an 8.0 % increase. A reliable change index found no significant changes from baseline to 2 and 4 months for ISLT Delayed Recall (z = −0.40, p = 0.34; z = −0.68, p = 0.25) or OCLT (z = 0.15, p = 0.56; z = 0.41, p = 0.66). Study findings support the possibility that hippocampal avoidance may be associated with preservation of memory test performance, and that these computerized tests also may be useful and valid memory assessments in multi-institution adult brain tumor trials.
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Acknowledgments
This study was presented in abstract form at the 2014 meeting (ESTRO 33) of The European Society for Radiotherapy & Oncology.
Funding
The study was approved by the National Cancer Institute (NCI) and supported by Radiation Therapy Oncology Group (RTOG) grant U10 CA21661, NRG Oncology Operations 1U10CA180868-01, NRG Oncology SDMC 1U10CA180822-01, Community Clinical Oncology Program Network grant U10 CA37422 and Imaging and Radiation Oncology Core 1U24CA180803-01 from the NCI. This manuscript’s contents are the sole responsibility of the authors and do not necessarily represent the official views of the NCI.
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Wolfgang A. Tomé serves on the scientific advisory board of View Ray Inc.; holds patents through Wisconsin Alumni Research Foundation (WARF); and has received research funding from NIH, Philips Medical System and Accuray. Minesh Mehta has served as a consultant for Abbott, BMS, Celldex, Elekta, Novelos, Novocure, Phillips and Roche; holds stock options in Pharmacyclics; has served as a speaker for Defined Health, IME and Serono; and has research funding from Novocure. Wenyin Shi performed consulting work for Elekta and Varian. None of these activities is related to this protocol.
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Caine, C., Deshmukh, S., Gondi, V. et al. CogState computerized memory tests in patients with brain metastases: secondary endpoint results of NRG Oncology RTOG 0933. J Neurooncol 126, 327–336 (2016). https://doi.org/10.1007/s11060-015-1971-2
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DOI: https://doi.org/10.1007/s11060-015-1971-2