QCM : Dermatitis and Psoriasis: Skin Inflammatory Disorders — 9 questions

Explication

Xerosis, or dry skin, is the most common cause of pruritus, especially in older adults and dry climates. It leads to skin roughness and scaling, which provoke itching. While infections, systemic illnesses, and allergies can cause pruritus, they are less prevalent as primary causes compared to xerosis.

Explication

Dry skin or xerosis is the most prevalent cause of pruritus, especially among older adults and in dry climates, due to the loss of skin moisture leading to itchiness.

Explication

The content states that atopic dermatitis affects 10-30% of children and 2-10% of adults. Therefore, the correct answer is the second option, which matches these prevalence ranges.

Explication

Atopic dermatitis is the most common type of eczema in children and is linked with allergic conditions, often presenting with itchy, dry skin.

Explication

Atopic dermatitis primarily reflects an underlying immune dysregulation that results in chronic skin inflammation, pruritus, and skin barrier impairment, rather than serving a protective or beneficial role.

Explication

Patch testing is the gold standard for diagnosing contact dermatitis by identifying specific allergens causing skin inflammation.

Explication

Psoriasis involves a T-cell mediated immune response resulting in increased keratinocyte proliferation, causing the characteristic plaques.

Explication

Chronic lichenification is a feature of long-standing or chronic eczema, not acute eczema which presents with edema and vesicles.

Explication

Management centers on avoiding triggers, moisturizing the skin, and applying topical anti-inflammatory medications to control inflammation and pruritus.