Tissue examination, also known as biopsy (6 letters), is a medical procedure in which a sample of tissue is taken from the body for further analysis. It is used to diagnose and treat a variety of diseases and conditions, such as cancer, infections, and autoimmune disorders. The tissue sample is typically examined under a microscope to identify any abnormalities or changes in the cells. Depending on the type of tissue being examined, additional tests may be performed to determine the cause of the abnormality.