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Ewing’s sarcoma family of tumours
•
Although Ewing’s sarcoma most commonly is an undifferentiated
tumor of bone, it may arise also from soft tissues
(extraosseous
Ewing’s sarcoma – EES)
•
A more differentiated form of this entity, known as
peripheral
primitive neuroectodermal tumor (pPNET)
, occurs as a primary
tumor of bone or soft tissues
•
Ewing’s sarcoma family of tumors (ESFT): a spectrum of a
single neoplastic entity