reverse transcription polymerase chain reaction
[re-verse tran-scrip-shun puh-lim-er-ace]
also called RT-PCR. A very sensitive test for finding specific cancer-related genetic changes (mutations) in blood, bone marrow, lymph nodes, or other tissue. RT-PCR uses chemical analysis of the ribonucleic acid or RNA (a substance related to deoxyribonucleic acid or DNA) to look for gene changes. See also bone marrow, chromosome, deoxyribonucleic acid, lymph node, mutation, ribonucleic acid, translocation.