MPO and non-small cell lung carcinoma: In order to address these concerns, we crafted an additional M-IHC panel including the marker myeloperoxidase (MPO) (based on the literature, at least a proportion of CD66b–MPO+ cells would represent neutrophil extracellular traps [NETs]) (26) and studied a subset of the NSCLC cohort (n = 12) to lend additional credence to our hypothesis.