Basic and Clinical Sciences (BCSE) Practice Exam

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What skin condition is typically associated with allergic contact dermatitis?

  1. Erythematous scaly plaque

  2. Fluid-filled vesicles

  3. Paper-thin skin

  4. Hyperpigmented spots

The correct answer is: Erythematous scaly plaque

The characteristic skin condition associated with allergic contact dermatitis is often presented as fluid-filled vesicles. Allergic contact dermatitis is an inflammatory reaction of the skin, typically resulting from exposure to allergens. This condition commonly develops in response to substances like poison ivy, nickel, or certain fragrances, leading to intense pruritus and a erythematous rash. Initially, the skin may develop red bumps that can progress to vesicles filled with fluid, which may eventually crust or ooze. The appearance of erythematous scaly plaques does occur in various skin conditions, but it is more closely associated with conditions like psoriasis rather than allergic contact dermatitis. In allergic contact dermatitis, the formation of vesicles is a hallmark feature, indicating the acute phase of inflammation and the body's immune response to the allergen involved. While scaly plaques may be indicative of chronic dermatitis or other skin disorders, they do not specifically represent the acute reaction seen in allergic contact dermatitis.