Superficial fungus infections are so readily treated that species identification by culture is a rare event. I don't try to make a species identification based on a biopsy. Mycotic folliculitis with the degree of inflammation that is seen in this case is sometimes caused by a zoonotic fungus (from an animal), but some human species can do this.
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Scan. |
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Low power of top of above. |
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High power periodic acid Schiff stain of above. Note hyphae near left side and yeast forms to right. |
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Low power showing inflamed granulation tissue that contains numerous polymorphonuclear leukocytes. From the deep aspect of the lesion. |