MKI67 and neuroepithelial neoplasm: The overall histologic impression when considering cellularity, Ki-67 labeling, mitotic index, and areas of necrosis supports a lower-grade neuroepithelial tumor in 2/6 cases (#4, #5), a higher-grade neuroepithelial tumor in 3/6 cases (#1, #2, #6), and in one case intermixed low and higher-grade areas (#3).