TED - Título De Especialista Em Dermatologia Practice Questions - Exame Para Obtenção Do Título De Especialista Em Dermatologia (TED - SBD AMB) Exam

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A 32-year-old male presents with reddish-brown macules and papules on the trunk. Stroking one of the lesions with a blunt wooden spatula produces rapid local swelling, erythema, and an urticarial wheal confined to the stroked lesion within 5 minutes. What is this diagnostic phenomenon, and which condition does it confirm?

Auspitz sign, pathognomonic of guttate psoriasis. Darier sign (sinal de Darier), pathognomonic of cutaneous mastocytosis (urticaria pigmentosa). Koebner isomorphic phenomenon, indicative of lichen planus. Hutchinson sign, indicative of subungual melanoma progression.

Correct Answer:

Darier sign (sinal de Darier), pathognomonic of cutaneous mastocytosis (urticaria pigmentosa).

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