Sebaceous dermatitis

Chronic, relapsing inflammation of the skin with predilection for areas with sebaceous cysts.

Characterized with inflammatory changes, scaling and erythematous patches.

Varies in extent and clinical findings depending on the skin area involved.

Scalp almost always involved.

Frequent areas of involvement include face, chest, and intertriginous areas.

Blepharoconjunctivitis may occur.

Male genitalia may have lesions.

Itching is moderate and usually involves the scalp and external ear.

In infants cradle cap (involving the scalp), the face and diaper region involvemnt up to 70% of newborns during the first 3 months of life.

Infantile form usually disappears by the first year.

Acutely associated with moist scaling areas.

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