Recommendations when to order or not order the test. May include related or preferred tests.
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).
Mnemonic
Unique test identifier.
LTE URN
Methodology
Process(es) used to perform the test.
Quantitative Colorimetry/Liquid Chromatography-Tandem Mass Spectrometry
Performed
Days of the week the test is performed.
Varies
Reported
Expected turnaround time for a result, beginning when ARUP has received the specimen.
3-12 days
New York DOH Approval Status
Indicates test has been approved by the New York State Department of Health.
This test is New York DOH approved.
Specimen Required
Patient Preparation
Patients taking 5-lipoxygenase inhibitor Zileuton/Zyflo may have decreased concentrations of leukotriene E4 (LTE4). If possible, discontinue 48 hours prior to collection.
Collect
Urine.
Specimen Preparation
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.
Storage/Transport Temperature
Frozen. Also acceptable: Refrigerated.
Unacceptable Conditions
Remarks
Stability
Ambient: 24 hours; Refrigerated: 1 week; Frozen: 28 days
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
By Report
Interpretive Data
Background information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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