Scalp Lesions in a Neonate

A 2-day-old boy presented to the emergency department (ED) with a scalp rash. Multiple demarcated vesicles were noted over the left parieto-occipital region, where a scalp electrode had been placed during labor. The vesicles measured 0.5 to 1 cm in diameter with crusting and underlying erythema. Prenatal care began late, at 24 weeks’ gestation. Maternal history was notable for treated chorioamnionitis associated with trichomonas and chlamydia. At the initial newborn outpatient follow-up visit, the baby was referred to the ED for worsening scalp lesions (Fig).