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November 2009

Confluent Scaly Erythematous Plaques on the Trunk of a 16-Year-Old Boy—Diagnosis

Author Affiliations




Arch Dermatol. 2009;145(11):1325-1330. doi:10.1001/archdermatol.2009.255-b

Microscopic examination of the skin biopsy specimen revealed an undulating epidermal surface with broad areas of lamellar hyperkeratosis, papillomatosis, and acanthosis with club-shaped, bulbous epidermal rete ridges. A few small mounds of parakeratosis were noted. There was mild dilatation of superficial blood vessels and a sparse, superficial perivascular lymphocytic infiltrate. Together with the clinical setting, the diagnosis of CRP of Gougerot and Carteaud was made. The cutaneous eruption responded completely at day 14 of an initial 6-week course of oral minocycline (100 mg twice daily). After a partial recurrence 3 weeks later, he was given an additional course of minocycline and has remained disease free to date (10 months).

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