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 bih, C. Presents as posterior cervical swelling, D. Sequstration of lymphatic tissue
A: Aspiration is diagnostic
Answer: A: Aspiration is diagnostic 
Explanation: Answer is (a) i.e. Aspiration is diagnostic Sabiston writes "Roughly 50% to 65% of hygromas prsent at bih, with most becoming apparent by the second year of life." About option 'a' - I have looked in Schwaz, Sabiston, CSDT, Nelson & Bailey. Nowhere its written that aspiration is needed for diagnosis.