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Acne in Childhood: an Update Wendy Kim, DO; and Anthony J

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Acne in Childhood: an Update Wendy Kim, DO; and Anthony J FEATURE Acne in Childhood: An Update Wendy Kim, DO; and Anthony J. Mancini, MD cne is the most common chron- ic skin disease affecting chil- A dren and adolescents, with an 85% prevalence rate among those aged 12 to 24 years.1 However, recent data suggest a younger age of onset is com- mon and that teenagers only comprise 36.5% of patients with acne.2,3 This ar- ticle provides an overview of acne, its pathophysiology, and contemporary classification; reviews treatment op- tions; and reviews recently published algorithms for treating acne of differing levels of severity. Acne can be classified based on le- sion type (morphology) and the age All images courtesy of Anthony J. Mancini, MD. group affected.4 The contemporary Figure 1. Comedonal acne. This patient has numerous closed comedones (ie, “whiteheads”). classification of acne based on sev- eral recent reviews is addressed below. Acne lesions (see Table 1, page 419) can be divided into noninflammatory lesions (open and closed comedones, see Figure 1) and inflammatory lesions (papules, pustules, and nodules, see Figure 2). The comedone begins with Wendy Kim, DO, is Assistant Professor of In- ternal Medicine and Pediatrics, Division of Der- matology, Loyola University Medical Center, Chicago. Anthony J. Mancini, MD, is Professor of Pediatrics and Dermatology, Northwestern University Feinberg School of Medicine, Ann and Robert H. Lurie Children’s Hospital of Chi- cago. Address correspondence to: Anthony J. Man- Figure 2. Moderate mixed acne. In this patient, a combination of closed comedones, inflammatory pap- ules, and pustules can be seen. cini, MD, Division of Dermatology Box #107, Ann and Robert H. Lurie Children’s Hospital of the microcomedone, which is a micro- 3) proliferation of Propionibacterium Chicago, 225 E. Chicago Avenue, Chicago, IL scopic plug of the follicular ostia of acnes (considered the “acne organ- 60611; email: [email protected]. the pilosebaceous unit. Four process- ism”); and 4) the release of inflamma- Disclosure: Dr. Kim is an advisory board par- es are necessary for an acne lesion to tory mediators.5 The sequence of these ticipantfor Galderma. Dr. Mancini is a consul- evolve: 1) altered shedding of the ke- events remains under investigation (ie, tant, speaker, and advisory board participant for Galderma. ratinocytes that line the pilosebaceous some recent studies suggest that even doi: 10.3928/00904481-20130924-13 unit; 2) increased sebum production; comedones may be preceded by inflam- 418 | Healio.com/Pediatrics PEDIATRIC ANNALS 42:10 | OCTOBER 2013 FEATURE matory events), but once the comedone TABLE 1. has formed it can proceed to become an inflammatory lesion.6 Treatment is de- Acne Lesion Nomenclature pendent upon the types and severity of Lesion Type Comment acne lesions that are present. Comedone May be closed (“whitehead”) or open (“blackhead”); believed to develop from microscopic plugs of desquamated cells from the IMPACT ON QUALITY OF LIFE follicle; early treatment of comedones may help prevent progres- Long regarded as a rite of passage sion to clinically inflammatory lesions. of adolescence, it is now clear that acne Inflammatory lesion May be a papule, pustule, or nodule; related to inflammatory patients suffer significant social and mediators, which increase in response to the P. acnes organism; psychological impact from the disease. nodules often result in scarring. Acne has been associated with anxiety, Post-inflammatory May be hypo- or hyperpigmentation, or erythema; changes may low self-esteem, embarrassment, social change last for months to years. withdrawal, and depression.7,8 In fact, the psychological impact of acne has Scarring A sequela of inflammatory acne; often persistent and very difficult been demonstrated to be as severe as to treat. that of patients with insulin-dependent diabetes, cystic fibrosis, cancer, epi- lepsy, and some psychiatric disorders.8 Several recent publications have ence higher rates of depression and based on the age of onset of the dis- addressed body dysmorphic disorder suicide than their peers. Cotterill and ease: neonatal acne occurs from birth (BDD), which is defined as a life-al- Cunliffe10 described 16 dermatology through age 4 weeks; infantile acne has tering preoccupation with a minimal patients who completed suicide, and al- its onset between age 1 and 12 months; or imperceptible flaw in appearance, in most half of this cohort had acne. Gupta mid-childhood acne occurs from age 1 acne patients.7,9 It occurs in an estimat- and Gupta11 showed that active suicidal year through age 6 years; and preado- ed 2% of the general population, but it ideation was found in 5.6% of acne pa- lescent or prepubertal acne occurs from has been estimated to occur in 6.7% of tients who were screened in a dermatol- age 7 to 11 years.4 The specific type of patients in a general dermatology clinic ogy clinic setting. Acne patients had a acne, based on this classification sys- and up to 14% of patients in a cosmetic higher score on the Carroll Rating Scale tem, helps to determine whether other dermatology clinic.9 These patients are for Depression (CRSD) than patients evaluations (eg, for an underlying endo- frequently dissatisfied with medical with alopecia areata, atopic dermatitis, crinologic abnormality) are indicated. treatment and procedural outcomes, and psoriasis involving less than 30% which makes adherence more chal- of the body surface area, suggesting a Neonatal Acne lenging.7 A high percentage (36.7%) higher rate of depression than patients Neonatal acne may affect up to 20% of acne patients with barely percep- with other chronic skin conditions. of infants, although this figure is dif- tible or mild acne were found to meet These statistics underscore the impor- ficult to confirm because there may be subjective criteria for BDD via survey, tance of recognizing the detriment to overlap with other papulopustular con- and patients who had received therapy body image and potential self-harm that ditions (eg, erythema toxicum neonato- with isotretinoin were twice as likely as acne patients may experience. Such ob- rum, eosinophilic folliculitis, transient controls to meet subjective criteria for servations also highlight the utility of neonatal pustular melanosis, milia, mil- BDD (15.5% of patients who had never early institution of therapy for acne. iaria). The lesions of neonatal acne may used isotretinoin vs. 31.8% of patients present from birth to age 4 weeks. Usu- who had used isotretinoin).7 Important- CONTEMPORARY ally, this type of acne is characterized ly, more than one-third of acne patients CLASSIFICATION by inflammatory lesions (papules and with barely perceptible to mild acne The term pediatric acne is used to pustules), although comedones may oc- reported severe disabling symptoms of describe acne that occurs from birth casionally be present. The latter are be- preoccupation with their acne.7 through age 11 years, with acne occur- lieved by some acne experts to be more It is important to be aware of the ring from age 12 years through adult- indicative of infantile acne than neona- potential psychosocial ramifications of hood referred to as adolescent acne. Pe- tal acne. Neonatal acne is believed to acne given that these patients experi- diatric acne can be further subdivided be caused by increased production of PEDIATRIC ANNALS 42:10 | OCTOBER 2013 Healio.com/Pediatrics | 419 FEATURE dehydroepiandrosterone (DHEA), in association with a large androgen-pro- ducing zona reticularis in the fetal adre- nal glands. There is also transplacental passage of androgens, which stimulate sebaceous glands, as well as testicular production of androgens. From birth through age 6 to 12 months, boys also have pubertal levels of testosterone, which might explain why acne is more common in male infants than in female infants.12 Figure 3. Neonatal cephalic pustulosis. This newborn had numerous pustules over the forehead and cheeks, and improved dramatically following therapy with a topical antifungal cream. In recent years, a more pustular pre- sentation of neonatal acne has been de- scribed and termed neonatal cephalic pustulosis (see Figure 3). A relationship between this condition and increased colonization with (or hypersensitivity to) Malassezia furfur, M. sympodialis, or other species has been suggested. In a 1996 cohort of 13 neonates, pus- tule smears from the faces and necks were notable for M. furfur in eight pa- tients, whose skin all cleared rapidly following application of ketoconazole cream.13 Subsequent studies have been inconsistent in their findings, but many experts still recommend consideration of topical antifungal therapy in neo- nates with severe pustular acneiform Figure 4. Infantile acne. This infant has numerous open comedones (“blackheads”) with occasional in- eruptions.14-16 flammatory papules. Infantile Acne Infantile acne begins sometime in the first year of life, typically between ages 4 to 6 weeks and age 1 year. It is more common in boys than in girls and is more likely than neonatal acne to be predominantly comedonal (see Figure 4). Inflammatory lesions may or may not be present, but if present they may occasionally be severe. Nodules can also occur occasionally, and when in- fantile acne is moderate to severe, scar- ring may result (see Figure 5). In pa- tients with infantile acne, the physical examination should include a growth assessment as well as evaluation for any features of precocious puberty or an- Figure 5. Infantile acne. The mild scarring present in this infant highlights the importance of considering early therapy for patients with moderate or severe involvement. drogen excess, including axillary odor, 420 | Healio.com/Pediatrics PEDIATRIC ANNALS 42:10 | OCTOBER 2013 FEATURE breast development, clitoromegaly, TABLE 2. presence of axillary and/or genital hair, Therapeutic Options for Neonatal, Infantile, and Mid- and increased muscle mass. If concerns Childhood Acne are present, laboratory workup and/or referral to a pediatric endocrinologist Type of Acne Therapeutic Options are recommended.
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