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What are the differentials for chronic plaque type psoriasis (psoriasis vulgaris)?

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Final answer:

Differentials for chronic plaque type psoriasis include eczema, seborrheic dermatitis, and contact dermatitis, due to similarities in symptoms like red, inflamed, and scaly skin. It is critical to differentiate psoriasis from these conditions to ensure proper treatment.

Step-by-step explanation:

The differentials for chronic plaque type psoriasis (psoriasis vulgaris) are important to consider due to the similarity in presentation with several other dermatological conditions. Psoriasis is characterized by itchy or sore patches of thick, red skin with silvery scales, and can often be mistaken for other skin disorders. Notable differentials include eczema, which is also an inflammatory condition but tends to be more associated with itching and can occur in individuals of all ages. Another potential differential is seborrheic dermatitis, which is characterized by moist, scaly skin inflammation, especially on the scalp, and is often associated with redness and scales.

Other skin conditions that might be considered include contact dermatitis, which is a reaction to exposure to irritants or allergens, and can present with red, inflamed skin similar to psoriasis but usually resolves when the irritant is removed. Additionally, other types of dermatitis, such as a tuberculin reaction, can mimic psoriasis but are usually associated with specific triggers.

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