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
All are true about cystic hygroma except - 
Select and explain. 
A. Aspiration is diagnostic, B. 50% present at birth, C. Presents as posterior cervical swelling, D. Sequstration of lymphatic tissue
A: Aspiration is diagnostic
Answer: A: Aspiration is diagnostic 
Explanation: Sabiston writes "Roughly 50% to 65% of hygromas prsent at birth, with most becoming apparent by the second year of life."