Cutis
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Folliculitis is a common complaint and its etiology may be related to a variety of factors. We examine a case involving a 57-year-old white man presenting with scalp erythema and folliculitis secondary to Demodex mite infestation. We discuss the pathophysiology of Demodex folliculitis, as well as the epidemiology, clinical manifestation, diagnosis, and treatment of this infection.
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Porphyria cutanea tarda (PCT) is a disorder caused by deficient activity of a liver enzyme that leads to the accumulation of photoactive metabolites in the skin. The initial clinical presentation commonly includes mechanical fragility of the skin and blisters in sun-exposed areas. ⋯ Although these unique skin changes have been reported in the literature, information regarding nonhealing ulcers of extraordinary size is lacking. We report a unique cutaneous manifestation of PCT that is not well documented: unusually large, nonhealing ulcers in the setting of sclerodermatous skin changes and scarring alopecia.