This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Surgery
[{'content': 'Treatment of choice for cystic hygroma is \nSelect and explain. \nA. Percutaneous aspiration, B. Intralesional sclerosant injection, C. En-bloc resection, D. Surgical excision', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Definitive treatment for Cystic hygroma is complete excision of the cyst at an early stage if possible. Injection of a sclerosing agent is an alternative strategy and may reduce the size of the cyst, however they are usually multicystic and therefore complete resolution is a challenge. Reference : Bailey & Love, 27th Edition, page no = 754.', 'role': 'assistant'}]