The test likely to help in diagnosis of a patient who presents with an itchy annular plaque on the face is –
Correct Answer: Potassium hydroxide mount
Description: The clinical picture is suggestive of a fungal infection most likely Tinea fascitis, KOH preparation is performed on scaling skin lesion when fungal etiology is suspected. Microscope examination after KOH digestion will show fungal hyphae.
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