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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 D

Explanation

Explanation: A skin biopsy is commonly performed to confirm the diagnosis of psoriasis. It involves taking a small sample of skin tissue from a psoriatic plaque and examining it under a microscope to identify the characteristic histological changes, such as hyperkeratosis, parakeratosis, and elongation of the rete ridges.

Incorrect choices: a. Skin patch testing for allergens: Patch testing is used to diagnose allergic contact dermatitis, not psoriasis.

b. Chest X-ray to assess lung involvement: Chest X-rays are not necessary for the diagnosis of psoriasis, as it primarily affects the skin and joints, not the lungs.

c. Complete blood count (CBC) to assess white blood cell count: While a CBC may be performed to assess inflammation, it is not specific to psoriasis and cannot confirm the diagnosis. A skin biopsy is needed for definitive diagnosis.

Correct Answer is B

Explanation

Explanation: A definitive diagnosis of psoriasis is often made through a skin biopsy, where a small sample of the affected skin is taken and examined under a microscope to confirm the presence of psoriasis-related changes.

Incorrect choices: a. Blood tests are not used to diagnose psoriasis, as it is not caused by a bacterial infection.

c. Chest X-rays are not part of the diagnostic process for psoriasis, as it primarily affects the skin and not the lungs.

d. Urinalysis is not used to diagnose psoriasis, as it does not provide relevant information about the skin condition.

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