University of Iowa Health Care

Department of Dermatology

Retention hyperkeratosis

Fig 1. Brown patch with follicular sparing on the chest. (Click images for higher resolution)

Brown patch with follicular sparing on the chest. (click images for higher resolution).
Fig 2. Resolution of brown patch after alcohol swab. (Click images for higher resolution)

Resolution of brown patch after alcohol swab. (click images for higher resolution).
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