Abnormality of Blood and Blood-Forming Tissues Abnormality of Neutrophils Neutrophils are the most abundant leukocytes in blood and are considered to be the first line of defense during inflammation and infections. They are myeloid granulocytes and their names is derived from the fact that their cytoplasm contains granules that stain with acidic dye as well as granules that stain with basic dye. Their nuclei consist of three to five lobes connected by slender threads of chromatin. Mature neutrophils live for approximately one day. Sufficient HP:0001874 A neutrophil abnormality. SCDO:1000440