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Which of the following is NOT a characteristic feature of psoriasis, aiding in its diagnosis?

D.

velopment of wheals and hives

K.

ebner phenomenon upon skin trauma

Answer and Explanation

The Correct Answer is C

Explanation: The development of wheals and hives is not characteristic of psoriasis. Wheals and hives are associated with urticaria (hives), which is a separate skin condition caused by histamine release.

Incorrect choices: a. Pitting and ridging of the nails: Pitting and ridging of the nails are common nail changes seen in psoriasis and can aid in its diagnosis.

b. Koebner phenomenon upon skin trauma: The Koebner phenomenon, where new psoriatic lesions form at sites of skin trauma or injury, is a characteristic feature of psoriasis.

d. Silvery-white scales on erythematous plaques: Silvery-white scales on erythematous (red) plaques are a classic feature of psoriasis and help differentiate it from other skin conditions.


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Related Questions

Correct Answer is D

Explanation

Explanation: Auspitz sign is a characteristic finding in psoriasis where pinpoint bleeding occurs when scales on the skin are removed. It is caused by the rapid growth and shedding of skin cells, which leads to the formation of delicate blood vessels that bleed easily.

Incorrect choices: a. Auspitz sign is not related to increased bleeding tendency in the patient; it is specific to psoriasis and its characteristic skin changes.

b. Presence of skin pustules and blisters is not associated with Auspitz sign and may indicate other skin conditions.

c. Formation of deep fissures in the skin is not directly related to Auspitz sign, which focuses on the bleeding after scale removal.

Correct Answer is C

Explanation

Explanation: Psoriasis commonly presents as red, scaly, and thickened patches on the skin. These patches can be itchy, painful, and sometimes crack and bleed.

Incorrect choices: a. Smooth and pink patches on the skin - This is not characteristic of psoriasis, which typically involves scaling and thickening of the skin.

b. Flaky, white patches on the skin - This is not typical of psoriasis; the patches are usually red and scaly.

d. Raised, flesh-colored bumps on the skin - This description does not match the typical appearance of psoriasis patches.

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