3 - 9 days
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Liquid Chromatography-Tandem Mass Spectometry (LC-MS/MS)
Diagnostic workup of patients with congenital adrenal hyperplasia; Part of metyrapone testing in the workup of suspected secondary or tertiary adrenal insufficiency; Part of metyrapone testing in the differential diagnostic workup of Cushing syndrome.
< or =18 years: <344 ng/dL, >18 years: 10-79 ng/dL.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in a red top or SST tube. Morning (8 a.m.) specimens are recommended. Indicate time of collection and whether specimen was collected pre- or post- metyrapone.
Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into plastic vial and refrigerate. Morning (8 a.m.) specimens are recommended. Indicate time of collection and whether specimen was collected pre- or post- metyrapone.