Retropharyngeal abscess in the setting of multisystem inflammatory syndrome in children.

Multisystem inflammatory syndrome in children (MIS-C) is a potentially severe inflammatory syndrome following recent infection with SARS-CoV-2 (COVID-19). In this report, we describe a 13-year-old boy with a retropharyngeal abscess unresponsive to initial antibiotic therapy who was found to have findings consistent with MIS-C, which included elevated interleukin-6, ferritin, and troponin levels. The patient had COVID-19 infection due to the Omicron variant.