Alopecia laboratory findings

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Laboratory Findings

The following laboratory tests can be completed in cases of a patient presenting with alopecia.

• Viral and bacterial cultures
• Prolactin
• Thyroid function tests
• Iron studies
• Dehydroepiandrosterone-sulfate (DHEA-S)
• Testosterone
• Rapid plasma reagin (RPR)
• Erythrocyte sedimentation rate (ESR)
• Antinuclear antibodies (ANA)

There are other tests available in cases in which there are other symptoms associated with alopecia.

• Medical illness suspected: CBC, TSH, possibly ferritin
• RPR if patchy or unexplained loss
• KOH prep if patchy alopecia with scaling or inflammation