All of the following are true about Ewing's sarcoma, EXCEPT
Responds well to radiotherapy
Grows in diaphysis of long bones
Common in 4th decade
Has onion peel appearance on radiograph
(C) Common in 4th decade # Ewing sarcoma, a highly malignant primary bone tumor.> The tumor is derived from red bone marrow.> Most frequently, it is observed in children and adolescents aged 4-15 years and rarely develops in adults older than 30 years.> Ewing sarcoma is the second most common malignant bone tumor in young patients, and it is the most lethal bone tumor.> Typically, the periosteal reaction and new bone formation with an onionskin appearance may suggest the diagnosis of E wing sarcoma.> It is highly radiosensitive and it melts like ice but only to recur at a later date.
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