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ACTH, Plasma

 
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Description
 

Limitations

With patients receiving more than 5mg/day of biotin, a sample should be taken no sooner than eight hours after previous dose. Patients treated with monoclonal mouse antibodies may have inaccurate results. High titer of antibodies such as streptavidin and ruthenium may cause interference. Due to its correlation with cortisol levels, ACTH concentration is affected by stress. Any single measure may be within the reference range for patients with increased production (Cushing's disease) or minimal production of ACTH.

Reference Range(s)

<3 Years Not established
3-17 Years 9-57 pg/mL
≥18 Years 6-50 pg/mL

Clinical Significance

Determination of ACTH is useful in differentiating between primary and secondary adrenocortical hypo- and hyperfunctional disorders: Addison's disease, Cushing's syndrome, adrenal carcinoma, ectopic ACTH syndrome, and adrenal nodular hyperplasia.

Alternative Name(s)

ACTH


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