Facial inflammatory dermatoses

Acne vulgaris is an inflammatory disorder of the pilosebaceous unit typical of adolescent age, even though adulthood onset is not rare in females. Lesions typical of acne include comedones, inflammatory papules, pustules, nodules and cysts. Acneiform eruptions are the main differential diagnosis of acne vulgaris. The evidence of comedones may come in handy to differentiate acne vulgaris from acneiform eruptions as the latter typically do not display such a feature. Rosacea is a benign, inflammatory dermatosis, mainly affecting the central face, characterized by abnormal vasomotor responses, persistent vasodilatation and increased vascular permeability. The dermoscopic hallmark of erythematotelangiectatic rosacea is represented by blurred linear vessels arranged in a reticular pattern. Seborrheic dermatitis (SD) is a frequent inflammatory skin disorder involving areas characterized by high sebum production. Infantile SD typically presents as yellowish, greasy scale on the scalp that is often referred to as “cradle cap”.