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JAMA Dermatology Clinicopathological Challenge
October 2015

Violaceous Eruption on the Head and Extremities

Author Affiliations
  • 1Sampson Regional Medical Center, Clinton, North Carolina
  • 2Pritzker School of Medicine, University of Chicago, Illinois
  • 3Department of Anatomic Pathology, NorthShore University HealthSystem, Skokie, Illinois
  • 4Division of Dermatology, Department of Medicine, NorthShore University HealthSystem, Evanston, Illinois

Copyright 2015 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.

JAMA Dermatol. 2015;151(10):1121-1122. doi:10.1001/jamadermatol.2015.2104

A man in his 50s of Indian descent presented with a pruritic eruption on his scalp, arms, neck, and feet. The eruption began during the summer 3 months before presentation. His medical history was significant for type 2 diabetes mellitus and hypertension, which were managed with metformin, glimepiride, and atenolol.

Physical examination revealed hyperpigmented annular plaques with violaceous borders on his scalp and the superior part of his forehead (Figure, A). There were violaceous papules on the dorsal aspect of the hands (Figure, B), extensor surface of the arms, and the nape of the neck.

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