Antigen-Presenting Cells

**Definition:** A heterogeneous group of immunocompetent cells that mediate the cellular immune response by processing and presenting antigens to the T-cells. Traditional antigen-presenting cells include MACROPHAGES; DENDRITIC CELLS; LANGERHANS CELLS; and B-LYMPHOCYTES. FOLLICULAR DENDRITIC CELLS are not traditional antigen-presenting cells, but because they hold antigen on their cell surface in the form of IMMUNE COMPLEXES for B-cell recognition they are considered so by some authors.

**Tree numbers:** - A11.066 - A15.382.066

**Synonyms:** - Accessory Cell, Immunologic - Accessory Cells, Immunologic - Cell, Immunologic Accessory - Cells, Immunologic Accessory - Immunologic Accessory Cell - Antigen-Presenting Cell - Immunologic Accessory Cells