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The primary diagnosis is based on how the skin looks. In some cases, the following tests may be done: KOH (potassium hydroxide) test; Skin lesion biopsy.
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Fungal (mycotic) cultures are microbiology laboratory tests to detect or rule out the presence of fungi (plural of fungus) in specimens taken from patients, animals, and the environment. The laboratory uses optimal conditions to grow and identify any fungus present in the specimen while attempting to eliminate or identify contaminants.
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The skin lesion KOH exam is a test to diagnose a fungal infection of the skin .
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