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Bodensohn, Raphael; Corradini, Stefanie; Ganswindt, Ute; Hofmaier, Jan; Schnell, Oliver; Belka, Claus und Niyazi, Maximilian (2016): A prospective study on neurocognitive effects after primary radiotherapy in high-grade glioma patients. In: International Journal of Clinical Oncology, Bd. 21, Nr. 4: S. 642-650

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Abstract

Neurocognition is a very important aspect of a brain tumor patient's quality of life following radiotherapy. The aim of the present study was to assess neurocognitive functions of patients diagnosed with high-grade gliomas undergoing radiotherapy by using the NeuroCogFx(A (R)) test and to examine relevant dose/volume parameters as well as patient characteristics potentially influencing the neurological baseline status and subsequent outcome. The cohort consisted of 44 astrocytoma World Health Organization grade III/IV patients. The NeuroCogFx(A (R)) test was carried out on patients during (N = 44) and after (N = 21) irradiation. The test examines verbal/figural/short-term/working memory, psychomotorical speed, selective attention and verbal speed. The results were compared with regular patient and treatment data with an emphasis on the dose applied to the hippocampus. Overall there were only slight changes in the median test results when comparing the baseline to the follow-up tests. In the 'verbal memory test' lower percentile ranks were achieved in left-sided tumors compared to right-sided tumors (p = 0.034). Dexamethasone intake during radiotherapy was significantly correlated with the difference between the two test batteries. Concerning figural memory, a correlation was detected between decreased figural recognition and the radiation dose to the left hippocampus (p = 0.045). We conclude that tumor infiltration of the hippocampus has an impact on neurocognitive function. However, treatment with radiotherapy seems to have less influence on cognitive outcome than expected.

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