Management of Lymphadenopathy with Increased Cortical Thickness

Initial Assessment and Risk Stratification

Lymphadenopathy persisting >2 weeks warrants further investigation and should be considered suspicious, according to the American College of Physicians, with cortical thickness >3 mm being suspicious and thickness >7 mm strongly correlating with metastatic disease 1
Recent infections, dental problems, trauma, or insect bites should be considered in the patient's history, as recommended by the American Academy of Family Physicians 1
Travel history and animal exposures should also be assessed, as suggested by the Centers for Disease Control and Prevention 1

Size >1.5-2 cm is concerning, particularly if >2 cm without improvement, and fixed, firm, matted, or ulcerated nodes are highly suspicious, according to the American College of Surgeons 1, 2
Unilateral vs. bilateral involvement should be evaluated, with unilateral suggesting localized pathology including malignancy, as noted by the American College of Radiology 2, 3

Complete blood count with differential and inflammatory markers (ESR, CRP) should be performed, as recommended by the American College of Physicians 1
HIV testing should be considered if risk factors are present, according to the Centers for Disease Control and Prevention 1
Tuberculosis testing should be performed, particularly if PPD positive, as suggested by the American Thoracic Society 2
Ultrasound is the first-line imaging modality to assess size, morphology, vascularity, and cortical thickness, according to the American College of Radiology 4, 1
For nodes ≥5 cm or in difficult anatomical sites, MRI or CT should be obtained to assess extent and involvement of underlying structures, as recommended by the American College of Radiology 5, 1

Ultrasound-guided core needle biopsy is superior to fine-needle aspiration and should be the preferred initial approach, with a sensitivity of 88% vs. 74%, as noted by the American College of Radiology 4
Excisional biopsy remains the gold standard when lymphoma is suspected or when core needle biopsy yields inconclusive results, according to the American College of Surgeons 2
For children with suspected nontuberculous mycobacterial (NTM) lymphadenitis, excisional biopsy without chemotherapy has ~95% success rate, as reported by the American Academy of Pediatrics 2

For cortical thickness >7 mm or with suspicious features, proceed directly to ultrasound-guided core needle biopsy or excisional biopsy, as recommended by the American College of Radiology 4
Do not give empiric antibiotics without evidence of acute bacterial infection, as this delays malignancy diagnosis, according to the American College of Physicians 2, 1

In children, consider NTM lymphadenitis if unilateral cervical adenopathy persists despite antibiotics, and excisional biopsy is treatment of choice for NTM cervical lymphadenitis, as noted by the American Academy of Pediatrics 2
Lymph nodes ≥1.5 cm persisting ≥2 weeks increase risk for malignancy or chronic infection in children, according to the American Academy of Pediatrics 2
In patients with epidermolysis bullosa or immunocompromised states, ultrasound-guided FNA or surgical biopsy should be performed if nodes are clinically palpable, as recommended by the American College of Dermatology 5