MME and neoplasm: In our study, CD10- CD16+ mature neutrophils were significantly more prominent in ascites (ascites: 67.82 ± 11.94% of neutrophils, tumor: 19.15 ± 7.06% of neutrophils), while CD10- CD16- immature neutrophils dominated in OC tissues (ascites: 24.74 ± 11.28% of neutrophils, tumor: 65.19 ± 8.99% of neutrophils).