Case Report: Cervical lymphadenitis resulting from <i>Pseudomonas aeruginosa</i> diagnosed by metagenomic next-generation sequencing

Pediatric cervical lymphadenitis is usually caused by <i>Staphylococcus aureus</i> and <i>Streptococcus pyogenes</i>. Cases resulting from Gram-negative bacteria are rare. Herein, we report the case of an 11-year-old boy who developed cervical lymphadenitis. He was diagnosed with a <i>Pseudomonas aeruginosa</i> infection through metagenomics next-generation sequencing of blood and biopsy. After treatment with meropenem, the patient's condition improved and he was discharged. Lymphadenitis may be caused by Gram-negative opportunistic pathogens. Metagenomic next-generation sequencing can help identify the underlying cause.