====== Lymphocyte ======

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Mononuclear [[cell]]s refer to [[blood cell]]s that have a single, round [[nucleus]], such as [[lymphocyte]]s and [[monocyte]]s. When isolated from circulating blood, they are called peripheral blood mononuclear cells (PBMC), but other sources exist, such as the [[umbilical cord]], [[spleen]], and [[bone marrow]].

===== Classification =====

A lymphocyte is any of 3 types of [[white blood cell]] in a vertebrate's immune system. All 3 are agranulocytes. They include natural killer cells (NK cells) (which function in cell-mediated, cytotoxic innate immunity), [[T cell]]s (for cell-mediated, cytotoxic adaptive immunity), and [[B cell]]s (for humoral, antibody-driven adaptive immunity). They are the main type of cell found in lymph, which prompted the name lymphocyte.

===== Platelet lymphocyte ratio =====
see [[Platelet lymphocyte ratio]]

===== Neutrophil to lymphocyte ratio =====
[[Neutrophil to lymphocyte ratio]].

===== Lymphocyte Phenotype =====
[[Lymphocyte Phenotype]]