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August 2006

Dairy Farmer With a Rapidly Enlarging Lip Lesion—Diagnosis

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Arch Dermatol. 2006;142(8):1059-1064. doi:10.1001/archderm.142.8.1059-f

Hematoxylin-eosin–stained sections showed thick scale-crust overlying an epidermis that contained numerous neutrophils. A sheetlike infiltrate of neutrophils admixed with mononuclear cells was present in the dermis. The hair follicles were dilated; numerous hyphae and spores surrounded the hair shaft (ectothrix); and there were organisms in the dermis. A periodic acid–Schiff (Figure 4) stain confirmed the presence of septate hyphae and spores within both the follicles and the dermis.