Described for James Ewing, the family of Tumors of Ewing understands a specter of neoplasias of primitive neuroectodrmicas cells, that are embryonic cells. These tumors primarily acometem soft bone (80%) and fabric, and are had as rare. Depending on the degree of neural differentiation, they are called Sarcoma de Ewing.Ossos long and flattened they are […]