Epithelioid Cells

**Definition:** Characteristic cells of granulomatous hypersensitivity. They appear as large, flattened cells with increased endoplasmic reticulum. They are believed to be activated macrophages that have differentiated as a result of prolonged antigenic stimulation. Further differentiation or fusion of epithelioid cells is thought to produce multinucleated giant cells (GIANT CELLS).

**Tree numbers:** - A11.329.372.300 - A11.627.482.300 - A11.733.397.300 - A15.382.670.522.300 - A15.382.680.397.300