MMP9 and head and neck squamous cell carcinoma: Furthermore, similar conclusions were driven in CRC (Colorectal cancer), HNSC (Head and Neck squamous cell carcinoma), PAAD (Pancreatic adenocarcinoma) and NSCLC (Non-small cell lung cancer) as concluded from PRAD, as genes highly correlated with MMP9 were enriched in pathway related to NETs such as Neutrophil degranulation and Neutrophil activation involved in immune response.