LOINC display name : DPYD gene.c.1236G A Molgen Ql (Bld/Tiss);
LOINC long common name : DPYD gene.c.1236G A [Presence] in Blood or Tissue by Molecular genetics method;
LOINC short name : DPYD gene.c.1236G A Bld/T Ql;
LOINC description : The c.1236G A variant of DPYD gene is part of the HapB3 haplotype, which also includes
other variants such as c.1129-5923C G. The c.1236G A variant is considered a tagging
single nucleotide polymorphism (SNP) that can identify the HapB3 haplotype. Patients
who are heterozygous or homozygous for HapB3 variant are deficient in the DPYD enzyme,
leading to increased risk toxicity from fluoropyrimidine chemotherapy drugs.;