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Which of the following skin features is commonly observed in psoriasis that aids in its diagnosis?

A.

Moist, oozing skin lesions

B.

Dark, hyperpigmented patches

C.

Presence of Auspitz sign upon examination

D.

Translucent, fluid-filled blisters

Answer and Explanation

The Correct Answer is C

Explanation: The Auspitz sign refers to the appearance of tiny bleeding points when the scales on psoriatic plaques are removed or scraped. This sign is a characteristic feature of psoriasis and helps differentiate it from other skin conditions.

Incorrect choices: a. Moist, oozing skin lesions: Moist, oozing lesions are not typical of psoriasis. Psoriasis plaques are dry and scaly in nature.

b. Dark, hyperpigmented patches: Hyperpigmentation is not a characteristic feature of psoriasis. Psoriatic plaques are typically erythematous (red) with silvery-white scales.

d. Translucent, fluid-filled blisters: Translucent, fluid-filled blisters are not typically associated with psoriasis. This description is more consistent with a condition called pemphigus, not psoriasis.


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Related Questions

Correct Answer is A

Explanation

Explanation: Psoriasis commonly affects the scalp, leading to the formation of red, scaly patches on the scalp's surface. It can also extend to the hairline and behind the ears.

Incorrect choices: b. Soles of the feet - Psoriasis can affect the soles of the feet, but it is less common than scalp involvement.

c. Abdomen - Psoriasis can occur on the abdomen, but it is not as frequently affected as the scalp.

d. Neck - Psoriasis can involve the neck area, but it is not the most common site of involvement.

Correct Answer is C

Explanation

Explanation: The presence of at least 3 typical psoriasis plaques on the body is one of the essential diagnostic criteria for confirming psoriasis. These plaques are characterized by well-defined, erythematous (red), raised lesions with silvery-white scales.

Incorrect choices: a. Positive skin biopsy showing eosinophils infiltration: While a skin biopsy may be performed to support the diagnosis of psoriasis, the presence of eosinophils is not specific to psoriasis and can be found in various skin conditions.

b. Family history of autoimmune diseases: A family history of autoimmune diseases may increase the risk of developing psoriasis, but it is not a definitive diagnostic criterion for the condition.

d. Elevated erythrocyte sedimentation rate (ESR) on blood test: An elevated ESR can indicate inflammation in the body, but it is not specific to psoriasis and may be present in other inflammatory conditions as well.

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