Peripheral blood mononuclear cell (PBMC) is a fraction of the leucocyte population in the blood composed by cells with round nucleus. PBMC consist of lymphocytes (T, B and NK cells) and monocytes. During extraction, neutrophils and platelets can be found in the PBMC fraction.
Reference: MiPNet21.17 BloodCellsIsolation
- Lymphocytes: 210 fl of volume; 7 to 10 µm in diameter 
- Monocytes: 180 fl of volume; 15 to 25 µm in diameter 
- Segel GB, Cokelet GR, Lichtman MA (1981) The measurement of lymphocyte volume: importance of reference particle deformability and counting solution tonicity. Blood 57:894-9
- Mardi D, Fwity B, Lobmann R, Ambrosch A (2010) Mean cell volume of neutrophils and monocytes compared with C-reactive protein, interleukin-6 and white blood cell count for prediction of sepsis and nonsystemic bacterial infections. Int J Lab Hematol 32:410-8