Homozygous UGT1A1*37 Positive

**Semantic type:** Laboratory or Test Result

**Definition:** An indication that homozygous expression of the UGT1A1*37 allele has been detected in a sample. This genotype is associated with decreased levels of metabolic activity against bilirubin and various pharmacologic agents, which is associated with increased risk for drug toxicity.

**Synonyms:** - Homozygous UGT1A1*37 - Homozygous UGT1A1*37 Genotype Positive - UDP Glucuronosyltransferase Family 1 Member A1*37/*37 - UDP Glucuronosyltransferase Family 1 Member A1*37/*37 Positive - UGT1A1 *37/*37 - UGT1A1*37/*37 - UGT1A1*37/*37 - UGT1A1*37/*37 Genotype Positive - UGT1A1*37/*37 Positive