MMP9 and infection: 2024; Ma et al. 2022) and post‐stroke complications, including infection (Brooks et al. 2014). NLR may also enhance clinical scoring systems, helping to identify patients at risk for adverse outcomes after EVT. Elevated NLR is linked to increased MMP‐9 release by neutrophils, which disrupts the BBB and contributes to sICH in patients post‐EVT (Jickling et al. 2013).