Thyroid Crisis — MFDS Part 1 MCQ

Instant feedback + full explanation. One question, done properly.

ModerateHuman DiseaseThyroid CrisisMFDS Part 1

During an emergency dental extraction, a patient with poorly controlled hyperthyroidism becomes acutely agitated and confused. Their temperature is 40.0°C and pulse rate is 150 beats/minute. Which medical emergency is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: C — Thyroid crisis (thyroid storm)

The correct answer is C, thyroid crisis (thyroid storm). It is a rare, life-threatening decompensation of poorly controlled hyperthyroidism that may be precipitated by physiological or emotional stress, including dental treatment. Hyperpyrexia, profound tachycardia and acute agitation or confusion are characteristic. Myxoedema coma is severe hypothyroidism and typically causes hypothermia, bradycardia and reduced consciousness. Adrenal crisis more often causes hypotension, vomiting and circulatory collapse. Diabetic ketoacidosis is associated with hyperglycaemia, dehydration and deep Kussmaul breathing. Anaphylaxis usually presents rapidly with airway, breathing or circulatory compromise, often accompanied by urticaria or angioedema. Suspected thyroid storm requires immediate cessation of treatment, emergency support and transfer by ambulance.

Reference: NHS. Complications – Overactive thyroid (hyperthyroidism), section: Thyroid storm. Last reviewed 11 April 2023. https://www.nhs.uk/conditions/overactive-thyroid-hyperthyroidism/complications/