Reasons you may not be able to have the test or why the results may not be helpful include having had a blood transfusion in the past 3 days.
What To Think About
A tissue type test is more useful than a blood type to see if two people may be related. Although tissue type cannot prove that two people are related, it can show how likely it is that they are related. Tissue type may be done as part of a lawsuit when blood relation is an issue. For more information, see the topic Blood Type.
A genetic test looks at a DNA sample for genes or to analyze the number, arrangement, and characteristics of the chromosomes.
Having an antigen pattern that is linked with certain diseases does not mean that the disease is present or will definitely develop. Your doctor will talk to you about the chance for developing the disease.
A person who wishes to be a possible tissue donor (such as a bone marrow donor) generally has a tissue type test. The person's antigen pattern is kept on file in a tissue donor bank and checked to see if it matches anyone needing a transplant.
There are registries of people who have had tissue typing done and who offer to be donors to anyone in need.
Other Works Consulted
Chernecky CC, Berger BJ (2008). Laboratory Tests and Diagnostic Procedures, 5th ed. St. Louis: Saunders.
Fischbach FT, Dunning MB III, eds. (2009). Manual of Laboratory and Diagnostic Tests, 8th ed. Philadelphia: Lippincott Williams and Wilkins.
Pagana KD, Pagana TJ (2010). Mosby’s Manual of Diagnostic and Laboratory Tests, 4th ed. St. Louis: Mosby Elsevier.
ByHealthwise Staff Primary Medical ReviewerE. Gregory Thompson, MD - Internal Medicine Specialist Medical ReviewerJoseph O'Donnell, MD - Hematology, Oncology