FRCS (ORL-HNS) · SECTION 1 SBA

Congenital neck mass

A child has a painless midline neck mass that moves upward on tongue protrusion. Ultrasound shows a cystic lesion and no normal thyroid in its usual position. What must occur before excision?

CHOOSE ONE ANSWER

Best of five

  1. A. Simple cyst drainage
  2. B. Confirm functioning thyroid tissue and define anatomy
  3. C. Immediate excision without thyroid assessment
  4. D. Radical neck dissection
  5. E. Radioactive iodine ablation
ANSWER AND REASONING

B. Confirm functioning thyroid tissue and define anatomy

A thyroglossal-duct remnant can contain the patient's only functioning thyroid. Imaging and thyroid assessment prevent removal of ectopic sole thyroid tissue; definitive surgery is a Sistrunk procedure when appropriate.

Why every option is right or wrong

A. Simple cyst drainage: This has high recurrence and does not address the tract.

B. Confirm functioning thyroid tissue and define anatomy: A thyroglossal-duct remnant can contain the patient's only functioning thyroid. Imaging and thyroid assessment prevent removal of ectopic sole thyroid tissue; definitive surgery is a Sistrunk procedure when appropriate.

C. Immediate excision without thyroid assessment: This could render the child hypothyroid.

D. Radical neck dissection: There is no evidence of malignancy or nodal disease.

E. Radioactive iodine ablation: This is not treatment for a benign developmental cyst.

What if the scenario changed?

If a normal orthotopic thyroid were confirmed, Sistrunk excision could proceed after infection had settled.

EDUCATIONAL USE

Independent Clinora educational preparation material; not official JCIE content, an accredited programme, clinical advice, or a substitute for current guidance, local policy and specialist judgement.

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