Free Board Review Questions of the Week – Erythema Toxicum Neonatorum

Adam WandermanFree Board Review Question of the Week, Pediatric Medicine Question of the Week, Personal Education

Free board review question of the week on erythema toxicum neonatorum

This week’s free board review question…


A 2-day-old female neonate is found to have large, generalized, erythematous papules with centralized vesicles on examination. She was born at 39 weeks via cesarean delivery. Her mother received routine prenatal care and has a history of giving birth to a previous child via cesarean delivery.

The infant has been breastfeeding well and has had 3 wet diapers and 1 meconium stool. Her vital signs have been normal since delivery.

On examination, she is sleeping comfortably. She has macules 2 to 3 cm in size with central vesicles 1 to 2 mm in size scattered over her face, trunk, arms, and legs. She has no jaundice. Her lungs are clear; she has no murmur and no organomegaly. The rest of the examination is normal.

The Figure illustrates the appearance of the dermatologic lesions.

erythema toxicum neonatorumA smear of a vesicle would predominantly show which of the following?

Answer Options

eosinophils
hyperkeratosis
multinucleated giant cells
polymorphonuclear leukocytes

And the answer is …


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