The 4-Year-Old with a Neck Mass and a Normal Ultrasound
A 4-year-old presents with a 2.5 cm, firm, nontender left level II neck mass first noticed 5 weeks ago. There is no fever, no weight loss, and no night sweats. The child is fully immunized, including BCG at birth. Ultrasound shows a solid, homogeneous mass with internal vascularity and no cystic component; FNA was attempted but yielded scant cellularity. CBC is normal; LDH is mildly elevated at 320 U/L. The family is reluctant to proceed with excision because "the ultrasound was normal."
1. How do you interpret the ultrasound and the failed FNA, and what is your next step?
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Interpretation: "Normal" on ultrasound meant no cyst or abscess, not benign. A solid, vascular, homogeneous level II mass in a 4-year-old with a mildly elevated LDH is concerning for lymphoma or a soft-tissue malignancy, and the failed FNA (scant cellularity) is nondiagnostic, not reassuring.
Next step: do not repeat FNA as the sole plan. Proceed to excisional biopsy (or core needle biopsy if the mass is deep and excision would be morbid) with the understanding that the specimen must be handled for flow cytometry, cytogenetics, and fresh tissue if lymphoma is suspected. Preoperative planning should include a pediatric oncology/surgery discussion and imaging (CT/MRI) to define extent and relationship to the carotid sheath.
Judgment point: the exam tests that a nondiagnostic FNA in a solid neck mass does not close the case.
2. The family asks why you cannot just observe for another few months since the child is well. What is your counseling, and what features would change your urgency?
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Counseling: observation is reasonable for a small, soft, mobile, likely reactive node that is stable or shrinking. This mass is firm, 2.5 cm, persistent at 5 weeks, solid and vascular on imaging, with a nondiagnostic FNA and elevated LDH. Those features shift the prior toward neoplasm and make delay risky.
Features that would increase urgency: rapid growth, fixation to deep structures, cranial nerve palsy, airway compromise, B symptoms (fever, night sweats, weight loss), or new cytopenias. Features that would allow observation: tenderness, fluctuation, recent URI, or a mass that shrinks on antibiotics.
Shared decision-making: document the discussion, offer a defined timeline (biopsy within 2 weeks), and explain that early diagnosis improves outcomes for lymphoma and rhabdomyosarcoma.
3. The excisional biopsy shows classical Hodgkin lymphoma. How does this change the role of the otolaryngologist, and what follow-up issues should you anticipate?
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Role: the otolaryngologist is no longer the primary treating physician but remains involved for airway surveillance, management of neck masses, and complications of therapy (mucositis, xerostomia, radiation fibrosis, hypothyroidism).
Anticipated issues:
- Airway: bulky mediastinal disease can compress the airway; monitor for stridor and orthopnea.
- Radiation late effects: hypothyroidism, dental caries, carotid stenosis, and second malignancies - long-term surveillance.
- Chemotherapy effects: neutropenic fever, mucositis, and ototoxicity if regimens include platinum agents (audiology baseline).
- Fertility and growth counseling - coordinate with oncology.
Judgment point: the exam tests that you recognize the handoff and the long-term surveillance role, not just the biopsy.