Acne Vulgaris
Acne Vulgaris ( 39 Questions)
The primary diagnostic criterion for acne vulgaris is the presence of comedones, which are non-inflammatory lesions that occur when hair follicles become clogged with sebum and dead skin cells. Comedones can be either open (blackheads) or closed (whiteheads) and are a hallmark of acne vulgaris.
Appearance of pustules - Pustules are inflammatory lesions seen in acne vulgaris, but they are not the primary diagnostic criterion.
Erythematous, raised plaques with silver scales - This description is characteristic of psoriasis, not acne vulgaris. Psoriasis is a chronic autoimmune skin condition.
Nodules and cysts on the skin - Nodules and cysts are severe forms of acne vulgaris, but they are not the primary diagnostic criterion. They may develop in later stages of the condition.
Explanation: The primary diagnostic criterion for acne vulgaris is the presence of comedones, which are non-inflammatory lesions that occur when hair follicles become clogged with sebum and dead skin cells. Comedones can be either open (blackheads) or closed (whiteheads) and are a hallmark of acne vulgaris.
Incorrect choices: b. Appearance of pustules - Pustules are inflammatory lesions seen in acne vulgaris, but they are not the primary diagnostic criterion.
c. Erythematous, raised plaques with silver scales - This description is characteristic of psoriasis, not acne vulgaris. Psoriasis is a chronic autoimmune skin condition.
d. Nodules and cysts on the skin - Nodules and cysts are severe forms of acne vulgaris, but they are not the primary diagnostic criterion. They may develop in later stages of the condition.