Ann Dermatol.  2010 Nov;22(4):463-464. 10.5021/ad.2010.22.4.463.

Unusual Presentation of Obesity-associated Dermatoses: Acanthosis Nigricans Involving Both Auricles

• Lee YB
• Lee JD
• Cho SH

• KMID: 2266189
• DOI: http://doi.org/10.5021/ad.2010.22.4.463

Abstract

Acanthosis nigricans is prevalent in the general population and is the most common dermatological manifestation of obesity. It is typically observed in the flexural areas such as the neck, axillae, and groin. Herein we report an interesting case of extensive acanthosis nigricans involving the neck, axillae, groin, and, uncommonly, the sulci of both auricles in an otherwise healthy but obese 23-year-old patient.

Keyword

Acanthosis nigricans; Auricle; Obesity; Pinna

MeSH Terms

Acanthosis Nigricans
Axilla
Groin
Humans
Neck
Obesity
Young Adult

Figure

• 

  Fig. 1 Several velvety brown-black plaques were visible on the neck and along the sulci of the pinnae of both ears.

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  Fig. 2 Histopathologic findings of the auricle revealed papillomatosis, hyperkeratosis, and focal parakeratosis in the epidermis (H&E, A: ×40, B: ×100).

Reference

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3. Schwartz RA. Acanthosis nigricans. J Am Acad Dermatol. 1994. 31:1–19.