Test Catalog

Test ID: LTE4    
Leukotriene E4, Urine

Useful For Suggests clinical disorders or settings where the test may be helpful

Evaluating patients suspected of having systemic mastocytosis


Identification of aspirin sensitivity in patient respiratory diagnoses


Systemic mastocytosis (SM) is a heterogeneous disorder; including N-methylhistamine (NMH), and 11 beta-prostaglandin F2 alpha (23BPG) provides a clinical sensitivity above 90% and specificity above 60%.

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

When leukotriene E4 testing is performed, urine creatinine will always be performed at no additional charge.

Special Instructions Library of PDFs including pertinent information and forms related to the test

Method Name A short description of the method used to perform the test

LTE4: Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

AACT: Enzymatic Colorimetric Assay

NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name Lists a shorter or abbreviated version of the Published Name for a test

Leukotriene E4, U

Aliases Lists additional common names for a test, as an aid in searching

Cysteinyl Leukotriene
Systemic Mast Cell Activation
Mast Cell Activation Syndrome