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: Orthopaedics
All are true about Ewing's sarcoma except 
Select and explain. 
A. Low grade tumor has good prognosis, B. Pain is most common symptom, C. Onion peel appearance, D. Associated with t(11,22)
A: Low grade tumor has good prognosis
Answer: A: Low grade tumor has good prognosis 
Explanation: All cases of Ewing's sarcoma are considered as high grade.
Histological grading has no prognostic significance.