Peripheral blood lymphocyte

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Peripheral blood lymphocytes (PBL) are mature lymphocytes that circulate in the blood, rather than localising to organs (such as the spleen or lymph nodes).[1][non-tertiary source needed] They comprise T cells, NK cells and B cells.


  1. ^ Harrison's Rheumatology: Medicine, Rheumatology. CTI Reviews. 26 September 2011.