4 - 10 days
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Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS)
Assist in screening for and monitoring mastocytosis and disorders of systemic mast cell activation.
Age 0-5 yrs: 120 - 510 mcg/g creatinine; age 6-16 yrs: 70 - 330 mcg/g creatinine; age >16 yrs: 30 - 200 mcg/g creatinine.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect random urine. Transfer urine aliquot to a plastic container and refrigerate. Patients should not consume histamine - rich foods (e.g., cheese, chicken liver, eggplant, sauerkraut, sirloin steak, spinach, tomatoes, wine, or yogurt) for 24 hours prior to start of or during urine collection. Indicate if patient is taking an antihistamine.