Management of Post‑Auricular Lymphadenitis in Children

Etiology Determination

In children < 3 years, subacute or chronic painless unilateral enlargement of a post‑auricular lymph node strongly suggests nontuberculous mycobacterial (NTM) cervical lymphadenitis, most commonly caused by Mycobacterium avium (≈ 71 % of cases) and showing a female predominance (≈ 64 %) in predominantly White populations. 1
When a granulomatous lymphadenitis is accompanied by a strongly positive tuberculin skin test (≥ 15 mm), empirical anti‑tuberculosis therapy should be started while awaiting culture results, especially if risk factors such as a positive family history or foreign‑born status are present; therapy may be stopped if cultures are negative and risk factors are absent. 1

Complete excisional surgery without adjunctive chemotherapy is the gold‑standard treatment for pediatric NTM cervical lymphadenitis, achieving an approximate 95 % success (cure) rate when performed with appropriate technique that avoids facial‑nerve injury. 1

In cases where surgical excision carries a high risk of facial‑nerve damage (e.g., pre‑auricular nodes), a clarithromycin‑based multidrug regimen—mirroring therapy for pulmonary Mycobacterium avium complex—can be employed as an alternative. 1
For recurrent NTM disease, a second surgical excision is usually considered; if surgery is not feasible, a repeat clarithromycin‑containing multidrug regimen may be used. 1

Incisional biopsy alone or the use of anti‑TB drugs without a macrolide for NTM lymphadenitis frequently leads to chronic drainage, sinus‑tract formation, and persistent disease; these approaches should be avoided. 1
Anti‑TB agents should never be used without a macrolide when treating NTM lymphadenitis. 1

Post‑piercing auricular perichondritis presents with painful swelling, warmth, and erythema that typically spares the earlobe. The most common causative organisms are Pseudomonas aeruginosa, Staphylococcus aureus, and Streptococcus pyogenes. 2
First‑line antimicrobial therapy consists of oral fluoroquinolones (ciprofloxacin or levofloxacin). Alternative agents—selected based on likely pathogen and susceptibility—include clindamycin, ceftazidime, or cefepime. 2
If an abscess develops, prompt surgical drainage is required in addition to antimicrobial therapy. 2

Relapse after complete surgical excision of NTM lymphadenitis occurs in only about 3 % of cases, and appropriate technique minimizes the risk of facial‑nerve palsy and cosmetic sequelae. (Evidence from the same cohort supporting the 95 % success rate.) 1