Accidental Thyroid Puncture: Potential Complications

Immediate/Early Complications

According to General Principles for Safe Performance of Ablation Techniques for Benign Thyroid Nodules (p. 10), early complications typically result from injury to critical surrounding structures including the esophagus, trachea, recurrent laryngeal nerve, carotid artery, vagus nerve, and cervical sympathetic ganglion.

Local Thyroid-Specific Effects

• Hematoma: The most common immediate complication. If a vessel within or around the thyroid is punctured, hematoma may form on needle withdrawal. Firm external pressure over the puncture site usually controls bleeding (p. 9).
• Thyroid hemorrhage: Can cause rapid neck swelling and potential airway obstruction — a surgical emergency.
• Transient thyroiditis: Inflammation at the puncture site, causing localized pain and tenderness.
• Thyroid storm (rare): Sudden release of thyroid hormones from traumatic disruption of follicles, particularly in a patient with pre-existing hyperthyroidism or toxic nodule.

Delayed Complications

• Pseudoaneurysm (if a vessel wall is partially injured)
• Infection / abscess (rare, from non-sterile technique)
• Hypothyroidism (if significant glandular tissue is destroyed)
• Fistula formation (tracheoesophageal, cutaneous — very rare)

Key Management Principles

1. Doppler ultrasound should be performed before needle insertion to identify and avoid thyroid vessels and anterior jugular veins.
2. If minor puncture occurs: apply firm external neck pressure to control bleeding.
3. Monitor for expanding hematoma — may require emergency surgical decompression if the airway is compromised.
4. Any signs of RLN injury (hoarseness) or sympathetic chain involvement (Horner's) warrant urgent evaluation.