T-cell receptor gene rearrangement test
(… reh-SEP-ter jeen REE-uh-RAYNJ-ment …)
A laboratory test in which cells in a sample of blood or bone marrow are checked to see if there are certain changes in the genes that make receptors on T cells (white blood cells). Testing for these gene changes can tell whether large numbers of T cells with a certain T-cell receptor are being made. This may be a sign of T-cell lymphoma or leukemia.