National Cancer Institute National Cancer Institute
U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
Send to Printer
single nucleotide polymorphism (... NOO-klee-oh-TIDE PAH-lee-MOR-fih-zum)

 The most common type of change in DNA (molecules inside cells that carry genetic information). Single nucleotide polymorphisms occur when a single nucleotide (building block of DNA) is replaced with another. These changes may cause disease, and may affect how a person reacts to bacteria, viruses, drugs, and other substances. Also called SNP.

Previous Definitions:simple mastectomy, simple nephrectomy, simple vulvectomy, simulation, single blind study
Next Definitions:single-photon emission computed tomography, Singulair, siplizumab, Sipuleucel-T, sirolimus