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Difficulty: EasyNeonatal Disorders

A 3-week-old female infant is brought to the pediatric clinic by her parents because of a new rash on her face. The parents first noticed the skin changes three days ago, and they have gradually increased in number. The mother had an uncomplicated pregnancy and a spontaneous vaginal delivery at 39 weeks of gestation. The infant is exclusively breastfed, feeds vigorously every 2 to 3 hours, and produces 6 to 8 wet diapers daily. Her temperature is 37.0°C (98.6°F), heart rate is 130/min, and respiratory rate is 35/min. Physical examination reveals multiple scattered erythematous papules and pustules confined to the infant's cheeks, forehead, and chin. No open or closed comedones are observed. The trunk and extremities are clear. The remainder of the physical examination is unremarkable. Which of the following is the most appropriate next step in management?

  1. Reassurance and daily washing with mild soap and waterAnswer
  2. B
    Application of topical mupirocin
  3. C
    Initiation of intravenous acyclovir
  4. D
    Administration of intravenous ampicillin and cefotaxime
  5. E
    Application of topical benzoyl peroxide

Answer

Reassurance and daily washing with mild soap and water
The correct approach is reassurance and daily washing with mild soap and water. This infant's presentation of erythematous papules and pustules limited to the face around 3 weeks of age, in the absence of comedones, is classic for neonatal cephalic pustulosis. Often inaccurately referred to as 'neonatal acne,' this condition is characterized by an inflammatory response to Malassezia species rather than true follicular obstruction. Because the infant is well-appearing, afebrile, and feeding normally, no aggressive diagnostic workup or specific pharmaceutical treatment is required. The condition is self-limiting and resolves over several weeks to months with gentle daily cleansing.

Step-by-Step Solution

1
Analyze the patient's demographics and clinical presentation.
The patient is a 3-week-old, well-appearing infant with erythematous papules and pustules exclusively on the face, without comedones.
Identifying the timeline and specific morphology of the rash helps narrow the differential diagnosis of neonatal dermatoses.
2
Differentiate from infectious or more severe dermatologic conditions.
The absence of fever, systemic symptoms, honey-colored crusts, and grouped vesicles rules out bacterial sepsis, impetigo, and herpes simplex virus.
Excluding life-threatening or infectious etiologies prevents unnecessary invasive testing and inappropriate pharmacotherapy.
3
Determine the specific diagnosis and appropriate management.
The findings are classic for neonatal cephalic pustulosis. The management is conservative with daily gentle cleansing.
Neonatal cephalic pustulosis is a benign, self-resolving inflammatory reaction often triggered by Malassezia species, requiring only basic hygiene.

Key Concept

Neonatal cephalic pustulosis is a benign, self-limiting eruption of facial papules and pustules without comedones, managed conservatively with routine cleansing.
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Topics

Neonatal Disorders

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