immunofluorescence
(IH-myoo-noh-floor-EH-sents)
A method used in the lab to detect certain antigens (markers) on a cell or in a tissue sample. Immunofluorescence uses antibodies that have a special dye attached to them to bind to the antigen in the sample. After binding, this dye allows cells or tissue that have the antigen to be seen under a microscope with a special light. Immunofluorescence may be used to help diagnose certain infections or diseases, such as cancer.