This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Treatment of choice of cystic hygroma 
Select and explain. 
A. Percutaneous aspiration, B. Intralesional sclerosant injection, C. En Block resection, D. Surgical excision
D: Surgical excision
Answer: D: Surgical excision 
Explanation: Surgical excision is most definitive treatment of cystic hygroma. Other treatments include Sclerotherapy and cautery etc.