Trichrome stains are a group of histological staining techniques used to differentiate between various tissue components in microscopic samples. They typically involve three different dyes, which allow for the visualization of proteins, collagen, and other cellular structures. This method is particularly useful in identifying connective tissue and assessing tissue damage or disease. One common application of trichrome staining is in the examination of muscle tissue and fibrosis. By highlighting different elements within the tissue, pathologists can better understand the underlying conditions, such as liver disease or pulmonary fibrosis, aiding in accurate diagnosis and treatment planning.