Cervical Lymphadenopathy

Etiology and Presentation

• Cervical lymphadenopathy in children between 1-5 years old is most commonly caused by Mycobacterium avium complex (MAC), accounting for approximately 80% of culture-proven cases, according to the American Thoracic Society 1
• The condition is also associated with cat scratch disease (Bartonella henselae), tularemia, and sporotrichosis, as noted by the American Academy of Ophthalmology 2
• Cervical lymphadenopathy can be caused by various conditions, including infections, malignancies, and autoimmune disorders, and a systematic approach to diagnosis and treatment is recommended by the American Thoracic Society 1

Diagnosis

• Initial laboratory evaluation should include:

  Test	Description
  Complete Blood Count	Evaluate for anemia, leukocytosis, or thrombocytopenia
  ESR	Evaluate for inflammation
  LDH	Evaluate for tissue damage
  Comprehensive Metabolic Panel	Evaluate liver and renal function
  Hepatitis B and C testing	Evaluate for hepatitis infection
  HIV testing	Evaluate for HIV infection

• Imaging studies, such as ultrasound, CT, and PET-CT, should be used to evaluate cervical lymphadenopathy, with ultrasound recommended as the first-line imaging modality by the American College of Radiology, and CT with contrast recommended for suspected malignancy, deep node evaluation, or staging 7, 8
• Fine-needle aspiration (FNA) and core needle biopsy are recommended as diagnostic tools, with excisional biopsy considered the gold standard for lymphoma diagnosis by the American Society of Clinical Oncology 9, 5, 10, 6
• Contrast-enhanced CT typically shows asymmetric adenopathy with ring-enhancing masses, as recommended by the American College of Radiology 1

Treatment and Management

• Surgical excision is the primary treatment for Mycobacterial infection, and standard anti-tuberculosis therapy is recommended for tuberculosis, as stated by the American Thoracic Society 1
• IVIG and aspirin are recommended as treatment for Kawasaki disease, which can present with cervical lymphadenopathy by the American Heart Association 7
• Levofloxacin (750 mg daily for 5-10 days) is recommended for broader coverage in adults with bacterial infections by the American Academy of Otolaryngology-Head and Neck Surgery 11
• Antibiotics should only be prescribed if there is evidence of bacterial infection, and patients should be reassessed within 2 weeks of treatment by the American Academy of Otolaryngology-Head and Neck Surgery 10
• Benign reactive lymphadenopathy can be managed with follow-up in 2-4 weeks, while patients on empiric antibiotics should be reassessed within 2 weeks, and biopsy is indicated if lymphadenopathy persists beyond 3-4 weeks despite appropriate therapy by the American Academy of Pediatrics 12, 10

Prognosis and Special Considerations

• Prognosis correlates with the number of nodal groups involved, as stated by the American Society of Hematology 13
• Patients with persistent lymphadenopathy >3 weeks, progressive enlargement, supraclavicular location, hard, fixed nodes, or age >40 years with unexplained lymphadenopathy require further evaluation by the American Academy of Family Physicians 14
• A lower threshold for biopsy is recommended in persistent unexplained lymphadenopathy, especially in those over 40 years, due to a higher risk of malignancy by the American Geriatrics Society 1, 3, 6
• Patients with HIV have a higher prevalence of opportunistic infections and non-Hodgkin lymphoma, and mycobacterial infections are more common, requiring a more thorough evaluation for opportunistic infections by the National Comprehensive Cancer Network 4, 5
• Most cervical lymphadenopathy in children is benign and self-limited, with acute bilateral cervical lymphadenopathy usually due to viral upper respiratory infections, and acute unilateral cervical lymphadenitis often caused by streptococcal or staphylococcal infection by the American Academy of Pediatrics 7
• Premature reassurance without adequate follow-up for persistent lymphadenopathy, empiric antibiotics without clear evidence of infection, inadequate physical examination, relying solely on physical examination for response assessment in lymphoma patients, and corticosteroid administration before establishing a diagnosis should be avoided by the American Medical Association 8