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Abstract
Acne affects between 40 to 50 million individuals in the United States. Recent findings
regarding the multifactorial pathogenesis of acne have facilitated a reexamination
of the classification of acne and acne-related disorders. Disorders without a microcomedo
as the initial pathologic condition are no longer classified as "acne." Research has
also identified that the clinical characteristics of acne vary with age, pubertal
status, gender, and race. These findings may have implications for the clinical management
of acne and acne-related disorders.