In that study, the ADA level of the misdiagnosed groups (range, 8.0–15.0 IU/L) overlapped with that of the true TBM group (range, 11.7–31.6 IU/L), while the proportion of lymphocytosis (median, 83% versus 60% in the misdiagnosis versus the true TBM group, respectively; p < 0.001) was the significant difference between the misdiagnosed and true TBM groups (Hong et al., 2017). This evidence concerns the gene ADA and meningeal tuberculosis.