input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 48-year-old female presents with an enlargement of her anterior neck which made swallowing very difficult for 2 weeks now. She has had constipation for the past 6 weeks and overall fatigue. She also had heavy menstrual bleeding; and often feels extremely cold at home. On the other hand, she has well-controlled asthma and spring allergies. On examination, the thyroid is stony hard, tender and asymmetrically enlarged. There is also pain associated with swallowing. Laboratory studies show a serum T4 level of 4.4 μg/dL and a TSH level of 6.3 mU/L. A radionuclide thyroid scanning indicates that the nodule has low radioactive iodine uptake. Which of the following is the most likely pathology to be found in this patient?   (A) Anaplastic carcinoma   (B) Medullary carcinoma   (C) Reidel thyroiditis   (D) Silent thyroiditis
output: ['(C) Reidel thyroiditis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Anaplastic carcinoma  (B) Medullary carcinoma  (C) Reidel thyroiditis  (D) Silent thyroiditis <> possible answers', '  A 48-year-old female presents with an enlargement of her anterior neck which made swallowing very difficult for 2 weeks now. She has had constipation for the past 6 weeks and overall fatigue. She also had heavy menstrual bleeding; and often feels extremely cold at home. On the other hand, she has well-controlled asthma and spring allergies. On examination, the thyroid is stony hard, tender and asymmetrically enlarged. There is also pain associated with swallowing. Laboratory studies show a serum T4 level of 4.4 μg/dL and a TSH level of 6.3 mU/L. A radionuclide thyroid scanning indicates that the nodule has low radioactive iodine uptake. Which of the following is the most likely pathology to be found in this patient? <> context']