This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: ENT
[{'content': 'Sistrunk operation is for: \nSelect and explain. \nA. Branchial cyst, B. Branchial fistula, C. Thyroglossal cyst, D. Thyroglossal fistula', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Thyroglossal cyst: - Cystic midline swelling (2-4 cm). - MC in young children. - Increases in size with upper respiratory tract infection and moves with tongue protrusion. Treatment: - Sistrunk operation: Complete surgical excision, including with it the body of the hyoid bone and core of tongue tissue around the tract in the suprahyoid tongue base to the foramen caecum.', 'role': 'assistant'}]