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Post-thyroidectomy hypocalcemia — USMLE Step 3 MCQ

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ModerateSurgery (post-operative, follow-up)Post-thyroidectomy hypocalcemiaUSMLE Step 3

A 45-year-old woman develops perioral numbness and hand cramping the day after total thyroidectomy. Chvostek sign is present. Calcium is 7.4 mg/dL. Which of the following is the most likely explanation for this patient's findings?

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Correct answer: A — Transient hypoparathyroidism from parathyroid gland injury or stunning

Hypocalcemia after thyroidectomy is commonly due to parathyroid injury, devascularization, or stunning.

Reference: American College of Surgeons perioperative care principles