acne neonatorum: a study of 22 cases. | acne is not uncommon in the neonatal period. acne neonatorum is characterized by a mainly facial eruption of inflammatory and noninflammatory lesions. it is most commonly mild and transient. hyperactivity of sebaceous glands, stimulated by neonatal androgens, has been implicated as the underlying pathogenetic mechanism. | 1999 | 10192162 |