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Ewing sarcoma
Pronunciation
Definition 1
A type of cancer that forms in bone or soft tissue. Also called peripheral primitive neuroectodermal tumor and pPNET. (NCI Dictionary)
Definition 2
A small round cell tumor that lacks morphologic, immunohistochemical, and electron microscopic evidence of neuroectodermal differentiation. It represents one of the two ends of the spectrum called Ewing sarcoma/peripheral neuroectodermal tumor. It affects mostly males under age 20, and it can occur in soft tissue or bone. Pain and the presence of a mass are the most common clinical symptoms. (NCI Thesaurus)
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