This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Which of the following is not true regarding Thyroglossal cyst? \nSelect and explain. \nA. 80% are found in juxtaposition to the hyoid bone, B. Heterotopic thyroid tissue present in 20% of cases, C. Rarely can contain foci of Follicular carcinoma, D. Treatment of choice is Sistrunk operation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thyroglossal cystO80% are found in juxtaposition to the hyoid boneOHeterotopic thyroid tissue present in 20% of cases.OSmooth, well-defined midline neck mass that moves upward with protrusion of the tongue.O1% of thyroglossal duct cysts are found to contain cancer ,Papillary (85%)."SISTRUNK OPERATION,"- en bloc cystectomy and excision of the central hyoid bone to minimize recurrence.', 'role': 'assistant'}]