<Tr> <Th> MeSH </Th> <Td> D006098 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terms of microanatomy (edit on Wikidata) </Td> </Tr> <P> Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm . They are also called polymorphonuclear leukocytes (PMN, PML, or PMNL) because of the varying shapes of the nucleus, which is usually lobed into three segments . This distinguishes them from the mononuclear agranulocytes . In common parlance, the term polymorphonuclear leukocyte often refers specifically to "neutrophil granulocytes", the most abundant of the granulocytes; the other types (eosinophils, basophils, and mast cells) have lower numbers . Granulocytes are produced via granulopoiesis in the bone marrow . </P> <P> There are four types of granulocytes: </P>

What is the most common type of granulocyte