"It is a distinct entity from but similar to malignant fibrous histiocytoma 2 (undifferentiated pleomorphic sarcoma) that may also rarely occur in bone, causing confusion in terminology, as the term "fibrosarcoma" has in the past encompassed a multitude of distinct histologic diseases."
"Ewing sarcoma"
Expected headings
"Signal characteristics"
"Typically highly destructive with a wide zone of transition, and occasionally expansile. Periosteal reaction is uncommon, but if seen is usually laminated, spiculated or Codman triangles. The lesion usually has no matrix mineralisation, but may have areas of sequestered bone. These tumours are often associated with a large soft tissue mass extending from the bone 1."