Pathology A 75-year-old lady is diagnosed of having a thyroid malignancy. Her serum calcium is low. What is the most likely explanation? A She has developed metastasis of the parathyroid B She has follicular carcinoma C She has papillary carcinoma D She has medullary carcinoma 💡 Explanation A 75-year-old lady is diagnosed of having a thyroid malignancy. Her serum calcium is low. What is the most likely explanation? ✓ Correct Answer: D. She has medullary carcinoma