The ear-lobe sign: a helpful sign in facial contact dermatitis.
The ear-lobe sign is seen in those who develop contact dermatitis to a substance applied with one hand to the skin of the face and neck. On the ipsilateral side of the face the ear-lobe is spared whereas on the contralateral side the ear-lobe is involved. The sign manifests because of the unique combination of the anatomy of the hand and the sweeping movement the hand makes during application.
Rotstein
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Department of Dermatology, St Vincent's Hospital, Fitzroy, Victoria, Australia.
Rotstein
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D000287:Administration, Topical; D017449:Dermatitis, Allergic Contact / Q000175:diagnosis* / Q000209:etiology; D004425:Ear Cartilage; D005148:Facial Dermatoses / Q000139:chemically induced / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male; D012680:Sensitivity and Specificity; D012882:Skin Tests / Q000379:methods*