Physical exam findings reveal tender lymphadenopathy, overlying erythema, or possible drainage from the affected lymph node. Often, patients will present with persistent symptoms despite antibiotic therapy, indicating the need for further testing for atypical causes or for lymph node drainage.
Suppurative lymphadenitis is a common complication of strep pharyngitis, and the most common bacterial causes are Staphylococcus aureus, Streptococcus pyogenes, Yersinia, Bartonella henselae, tuberculosis, and lymphogranuloma venereum.
L04.9 – Acute lymphadenitis, unspecified
48573006 – Suppurative lymphadenopathy