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Question

Difficulty: MediumNeonatal Disorders

A 4-week-old boy is evaluated in the pediatric clinic after his parents noticed a new facial eruption. The parents report that the lesions began developing three days ago and seem to be increasing in number. The infant was born at 39 weeks gestation via uncomplicated vaginal delivery to a 28-year-old primigravid mother. He is exclusively breastfed, stooling normally, and gaining weight appropriately. Vital signs are within normal limits. Physical examination reveals an alert, well-appearing infant. There are multiple small, erythematous papules and pustules scattered across the patient's forehead, cheeks, and chin. No true comedones are observed. The remainder of the skin examination, including the trunk and extremities, is unremarkable. Which of the following is the most appropriate next step in management for this patient?

  1. Reassurance and daily cleansing with mild soap and waterAnswer
  2. B
    Topical clindamycin and benzoyl peroxide application
  3. C
    Hospital admission for intravenous acyclovir and lumbar puncture
  4. D
    Oral erythromycin therapy for 14 days
  5. E
    Application of mupirocin 2% ointment

Answer

Reassurance and daily cleansing with mild soap and water
The correct management for this patient is reassurance and daily cleansing with mild soap and water. The infant's presentation is classic for neonatal cephalic pustulosis (often colloquially called neonatal acne, though it lacks true comedones). It typically presents around 3 weeks of age with inflammatory papules and pustules primarily on the face, specifically the forehead, cheeks, and chin. Because this is a benign inflammatory reaction (likely a response to Malassezia species), it does not require targeted anti-acne therapy, topical antibiotics, or systemic antivirals. It spontaneously resolves over a few weeks to months without scarring, and parents should simply be reassured and advised to wash the face gently.

Step-by-Step Solution

1
Analyze the clinical presentation and timing.
The patient is a well-appearing 4-week-old with erythematous papules and pustules confined to the face, lacking comedones.
Timing (first few weeks of life), morphology (papules/pustules without comedones), and location (face) are key to distinguishing neonatal rashes.
2
Differentiate from similar conditions.
Rule out infantile acne (occurs later, has comedones), erythema toxicum neonatorum (occurs earlier at 1-3 days, often involves trunk), and HSV (vesicles, ill-appearing infant).
Identifying the specific benign rash prevents unnecessary, potentially harmful treatments.
3
Select the appropriate management.
Diagnose neonatal cephalic pustulosis (neonatal acne) and determine that supportive care is required.
Neonatal cephalic pustulosis is self-limiting and only requires gentle washing.

Key Concept

Neonatal cephalic pustulosis is a benign, self-limiting eruption of papules and pustules on the face of infants at roughly 3 weeks of age, managed with gentle daily cleansing.
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Topics

Neonatal Disorders

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