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 of the following are diaphyseal tumors except? 
Select and explain. 
A. Ewings sarcoma, B. Histiocytosis, C. Fibrosarcoma, D. Aneurysmal bone cyst
D: Aneurysmal bone cyst
Answer: D: Aneurysmal bone cyst 
Explanation: Ans. is d i.e., Aneurysmal bone cyst