IL17A and glioblastoma: In GBM patients, high IL‐17A infiltration is associated with poorer prognosis, suggesting it as a potential prognosis factor.16 Previously, it has been reported by other group that IL‐17A protein expression is increased in traumatic brain injury group compared with the sham‐operated group in a rat model.44 As a pro‐inflammatory factor, the IL‐17A expression is weak in normal tissues but much strong in the trauma tissue.