Abstract
A 6-month-old boy presents with a temperature of 38.9°C and barking cough of 3 days’ duration as well as a rash over his body for 1 day. On physical examination, his temperature is 37.5°C, respiratory rate is 28 breaths/min, and blood pressure is 87/52 mm Hg. He appears nontoxic and has a barking cough, injected conjunctiva with whitish discharge, dry lips, mild inspiratory stridor, a blanching erythematous maculopapular rash on his trunk and extremities, and small cervical lymph nodes. The rest of his physical findings are normal. His Hgb is 12.8 g/dL (128 g/L), WBC count is 11.7×103/mcL (11.7×109/L) with 75% neutrophils and 23% lymphocytes, and platelet count is 515×103/mcL (515×109/L). His stridor is considered to be due to viral croup, and he is treated with intramuscular (IM) dexamethasone and nebulized racemic epinephrine. A lateral neck radiograph reveals widening of the retropharyngeal space (Fig. 1), and he is started on clindamycin. CT scan of the neck reveals a right retropharyngeal abscess (Fig. 2). He continues to have high spiking fevers and experiences stridor at rest. He is started on IM dexamethasone every 6 hours, and his fever subsides the following day. Figure 1. Lateral neck radiograph showing widening of the retropharyngeal space. Figure 2. CT scan of the neck showing a right retropharyngeal abscess (arrow). On hospital day 6, the corticosteroids are stopped, but the fever returns the following day. Two days later, an erythematous maculopapular rash reappears, and the child’s lips are dry and cracked. On day 10, repeat CT scan shows that the retropharyngeal abscess has resolved. An additional imaging study reveals the cause of his symptoms. A 3-month-old previously healthy girl presents to the ED with a 1-day history of a blistering rash. Her parents noted an erythematous area on her occiput after …
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