Immunocytochemistry is a laboratory technique used to visualize specific proteins or antigens in cells. This method involves using antibodies that bind to the target proteins, allowing researchers to identify their presence and location within the cells. The antibodies are often tagged with fluorescent dyes or enzymes, which produce a detectable signal when exposed to light or specific substrates. This technique is widely used in cell biology, pathology, and diagnostic medicine to study cellular structures and functions. By providing detailed images of cellular components, immunocytochemistry helps scientists understand disease mechanisms and develop targeted therapies.