positive results; phenytoid therapy alters dexamethasone metabolism and may lead to false results


<80 pg/mL in a.m.

Results vary.

Elevated with high cortisol

hormone level

<50 pg/mL in p.m.

See explanation.

levels if ACTH producing tumor; decreased with high cortisol levels if adrenal adenoma or carcinoma is present

Other Tests: Complete blood count (CBC), computed tomography (CT) scan, ultra-

sound, and angiogram

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