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Essentials of Diagnosis
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Marked itching in intertriginous areas, usually sparing the scrotum
Peripherally spreading, sharply demarcated, centrally clearing erythematous lesions
May have associated tinea infection of feet or toenails
Laboratory examination with microscope or culture confirms diagnosis
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General Considerations
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Itching may be severe, or the rash may be asymptomatic
Typical lesions are erythematous and sharply demarcated, with central clearing and active, spreading scaly peripheries
Follicular pustules are sometimes encountered
The area may be hyperpigmented on resolution
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Differential Diagnosis
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