A 49-year-old woman presents with perioral numbness and carpopedal spasm 2 days following total thyroidectomy. Vital signs show BP 128/82, HR 88, RR 16, temperature 37.2°C. Physical examination demonstrates facial twitching upon tapping the facial nerve. Laboratory studies reveal serum calcium 7.2 mg/dL (normal 8.5-10.5), phosphate 5.1 mg/dL (normal 2.5-4.5), and intact PTH 18 pg/mL. She denies neck pain. Which of the following is the most likely cause of her symptoms?

1. A)Excess calcitonin from medullary carcinoma
2. B)Thyroid storm
3. C)Pheochromocytoma
4. D)Accidental removal or damage to parathyroid glandsGABARITO
5. E)Graves ophthalmopathy