GFAP and neoplasm: The expression of GFAP, Ki67, and S100 was reported as follows: 367 patients had GFAP results with four negatives (0 point), 323 positives (1 point), and 35 medium (2 points), or 5 high positives (3 points); 348 patients underwent Ki67 tests, including 96 negatives or low positives (≤5% in tumor cells), and 252 strong positives (>5%); 338 patients underwent S100 tests, which included eight negatives (0 points), 315 positives (1 point), and 15 medium positives (2 points).