CELL TYPES IN PLEURAL FLUIDS Hematological Origin>Neutrophils(PMN)> Lymphocytes>Macrophages/Monocytes>Eosinophils>Basophils>Plasma Cells>Reb Blood Cells(RBC) Tissue Origin and Miscellaneous >Mesothelial Cells >Macrophages (Histiolocytes) >Malignant Cells >Mast Cells