Which of the following diagnostic criteria is essential for confirming the diagnosis of psoriasis?
Positive skin biopsy showing eosinophils infiltration
Family history of autoimmune diseases
Presence of at least 3 typical psoriasis plaques on the body
Elevated erythrocyte sedimentation rate (ESR) on blood test
The Correct Answer is C
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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Related Questions
Correct Answer is B
Explanation
Explanation: Psoriasis is characterized by the presence of itchy, raised, red patches on the skin with silvery scales. These patches are known as plaques and are a hallmark feature of psoriasis.
Incorrect choices: a. Painful, deep ulcers on the skin: This description does not align with psoriasis. Psoriasis plaques are not typically painful or ulcerated.
c. Small, fluid-filled blisters on the palms and soles: This description is more characteristic of a condition called palmoplantar pustulosis, not psoriasis.
d. Thickened, hardened skin with deep cracks: This description is more typical of a condition called lichenified eczema or chronic contact dermatitis, not psoriasis.
Correct Answer is D
Explanation
Explanation: Chronic psoriasis is characterized by thickened, scaly plaques with silvery-white scales. These plaques result from the excessive growth and turnover of skin cells in psoriasis.
Incorrect choices: a. Generalized redness with no scaling: This description does not align with chronic psoriasis. Psoriasis plaques are typically scaly and have a characteristic appearance.
b. Pustules and fluid-filled blisters: Pustular psoriasis is a specific subtype of psoriasis characterized by pustules, but it is not a hallmark of chronic psoriasis.
c. Hyperpigmented patches with rough texture: Hyperpigmentation and rough texture are not typical features of chronic psoriasis. The characteristic feature is the presence of silvery-white scales on thickened plaques.
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