AIT Type 1 Mechanism — FRCA Final MCQ
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Correct answer: D — Pituitary dysfunction
Type 1: excess iodine (amiodarone is 37% iodine) provides substrate for increased hormone synthesis in pre-existing thyroid pathology. Type 2: destructive thyroiditis releasing preformed hormone.
Reference: RCOA – 2023 – Endocrine anaesthesia; NICE – 2019 – NG145