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Off-Center Fold
July 2011

Perifollicular Papules and Hyperkeratotic Plaques on the Back in a Blaschkoid Distribution —Quiz Case

Author Affiliations
 

SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; SENAIT W. DYSON, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD

Arch Dermatol. 2011;147(7):857-862. doi:10.1001/archdermatol.2011.165-a

A 28-year-old African American man presented with a history of asymptomatic scaly areas on his back. He stated that the lesions started in his axilla and slowly expanded toward his back over the past 6 months. His medical history was remarkable only for urticaria controlled with daily use of cetirizine hydrochloride. Physical examination revealed perifollicular hyperkeratotic papules coalescing into well-demarcated plaques with fine scale and a slightly raised erythematous border in a blaschkoid distribution from his right axilla to his upper back (Figure 1). A biopsy specimen was obtained from his right posterior shoulder (Figure 2 and Figure 3).

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