SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD; LORI D. PROK, MD
Histopathologic findings revealed epidermal psoriasiform hyperplasia with mature keratinocytes and scattered areas of spongiosis and erosion. Focal areas of the superficial epidermis appeared pale and boggy with parakeratosis (Figure 3). The dermis showed a superficial, predominantly lymphohistiocytic inflammatory infiltrate. Periodic acid–Schiff staining did not reveal fungi, and findings from direct immunofluorescence studies were unremarkable.
Periorificial Dermatitis and Erosive Inguinal Plaques in a 57-Year-Old Woman—Diagnosis. JAMA Dermatol. 2013;149(3):358-363. doi:10.1001/archderm.149.3.358-f