Aids in the initial evaluation of suspected cases of mast cell activation disorders. A 24-hour urine collection is preferred; refer to Leukotriene E4, 24-Hour Urine (3004792).
Quantitative Colorimetry/Liquid Chromatography-Tandem Mass Spectrometry
New York DOH Approval Status
Patients taking 5-lipoxygenase inhibitor Zileuton/Zyflo may have decreased concentrations of leukotriene E4 (LTE4). If possible, discontinue 48 hours prior to collection.
Transfer 5 mL urine to ARUP Standard Transport Tubes (Min: 2 mL).
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Frozen. Also acceptable: Refrigerated.
Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month
Performed by non-ARUP Laboratory
|Component Test Code*||Component Chart Name||LOINC|
|3004162||Creatinine, Random Urine|
- Cysteinyl Leukotriene
- Systemic mast Cell Activation
Mayo Clinic Laboratories