Unit Code 5081:
Histamine, 24-Hour Collection, Urine
Useful For 
Suggests clinical disorders or settings where the test may be helpful
Evaluating patients for diseases of immediate hypersensitivity or
mast cell proliferation (mastocytosis).
Above-normal levels of histamine in plasma and urine occur after
allergen challenge in patients with immediate hypersensitivity and
in patients with systemic mastocytosis.
Histamine appears in blood shortly after mast cell activation, but
the levels may become undetectable within 60 minutes. Consequently,
it may be preferable, depending on the time elapsed since allergen
exposure, to measure histamine in urine either in an aliquot from an
acidified 24-hour urine collection or in a random urine specimen.(2)
Special Instructions and Forms Describes specimen collection and preparation information, test algorithms, and other information pertinent to test. Also includes pertinent information and consent forms to be used when requesting a particular test
Method Name A short description of the method used to perform the test
Enzyme Immunoassay (EIA)
Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name
Histamine, 24 Hr, U
Ordering Mnemonic An alternate Mayo code (to the Unit Code) for a test
HST24
Aliases Lists additional common names for a test, as an aid in searching
Mast Cell Disease
Mastocytosis
Soft-HST24
Systemic Mastocytosis
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