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In some cases, a tissue type test may be done to see whether a person has a chance for developing certain diseases that cause the body to attack its own cells, such as autoimmune diseases. A special pattern of antigens (called tissue type) is present on each person's cells and tissues.
A: Buccal swabs are used to collect cheek cells from inside your mouth. These cheek cells provide DNA for HLA testing, which is used to determine a match between a donor and a patient. Buccal swabs provide the least invasive way of collecting DNA samples for HLA testing.: This method of collecting DNA is similar to what is seen on TV. However, the NMDP uses your DNA ONLY for HLA testing. HLA testing is used to determine an individualâs tissue type so it can be listed on the NMDP Registry where it will be matched against the tissue types of patients who need marrow donors.