Black-spot poison ivy.
In black-spot poison ivy dermatitis, a black lacquerlike substance forms on the skin when poison ivy resin is exposed to air. Although the Toxicodendron group of plants is estimated to be the most common cause of allergic contact dermatitis in the United States, black-spot poison ivy dermatitis is relatively rare.
Schram
Sarah E
SE
Department of Dermatology, Minneapolis Veterans Affairs Medical Center, Minneapolis, MN, USA.
Willey
Andrea
A
Lee
Peter K
PK
Bohjanen
Kimberly A
KA
Warshaw
Erin M
EM
D000328:Adult; D011040:Dermatitis, Toxicodendron / Q000473:pathology*; D003937:Diagnosis, Differential; D005148:Facial Dermatoses / Q000473:pathology; D005260:Female; D006229:Hand Dermatoses / Q000473:pathology; D006801:Humans; D012867:Skin / Q000473:pathology*; D012251:Toxicodendron