Dermoscopy of black-spot poison ivy

Ryan K Rader¹ BS, Ruipu Mu² BS, Honglan Shi² PhD, William V Stoecker¹ MS MD, Kristen A Hinton¹BS
Dermatology Online Journal 18 (10): 8 

1. Stoecker & Associates, LLC, Rolla, Missouri
2. Missouri University of Science and Technology, Department of Chemistry, Rolla, Missouri

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Abstract

Black-spot poison ivy is an uncommon presentation of poison ivy (Toxicodendron) allergic contact dermatitis. A 78-year-old sought evaluation of a black spot present on her right hand amid pruritic vesicles. The presentation of a black spot on the skin in a clinical context suggesting poison ivy is indicative of black-spot poison ivy. Dermoscopy revealed a jagged, centrally homogeneous, dark brown lesion with a red rim. A skin sample was obtained and compared against a poison ivy standard using ultra-fast liquid chromatography-tandem mass spectrometry (UFLC-MS/MS). This finding confirmed the presence of multiple urushiol congeners in the skin sample. Black-spot poison ivy may be added to the list of diagnoses that show a specific dermoscopic pattern.

Full Text

 Peer Reviewed

Title:

Dermoscopy of black-spot poison ivy

Journal Issue:

Dermatology Online Journal, 18(10)

Author:

Rader, Ryan K;
Mu, Ruipu;
Shi, Honglan;
Stoecker, William V;
Hinton, Kristen A

Publication Date:

2012

Publication Info:

Dermatology Online Journal, UC Davis

Permalink:

http://escholarship.org/uc/item/08f5c7s0