This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neoplasia, Subject name: Surgery
Commonest posterior mediastinal tumour is: 
Select and explain. 
A. Lung cyst, B. Neurofibroma, C. Dermoid, D. Thyroid
B: Neurofibroma
Answer: B: Neurofibroma 
Explanation: Ans: b (Neurofibroma)Ref: Bailey & Love, 24th ed, p. 862, Fig (56.20) & 23rd ed p. 791, Schwartz, 7th ed p. 772