TURKISH NEUROSURGERY, cilt.30, sa.5, ss.643-650, 2020 (SCI-Expanded)
AIM: To evaluate the interobserver variability in determining the number of mitoses in 10 high-power field (HPF) and thus the tumor grade, and to investigate how to reduce grade discordance between the observers and the most useful method to identify the patients who would receive an additional treatment.