Dermatophytosis

May 16, 2013
Ted Rosen, MD

This solitary, very pruritic, annular lesion suggests dermatophytosis. KOH preparation verified the presence of Tinea faciei. This infection is usually associated with contact with a new kitten or puppy.

A 7-year-old boy presented with a solitary, nearly circular, very pruritic inflammatory facial lesion. He was otherwise in good health.

Key point: Annular lesions suggest dermatophytosis. The intensity of the inflammatory response suggests a non-human source for the fungus (the presence of which was verified by potassium hydroxide preparation).

Treatment: Twice-daily application of sertaconazole 2% cream led to prompt resolution of this prototypical case of tinea faciei.

Note: Most of the time, this phenomenon is associated with acquisition a new kitten or puppy. In this case, the child had contact with a new kitten while playing at a friend’s house.

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