Ewing's sarcoma, also known as undifferentiated reticular cell tumor, primary bone marrow cells of the original, is a common malignant tumor of bone. Is Ewing (1921 years) first reported at the time known as "diffuse bone hemangioendothelioma." Then Oberling (1928 years) that originated in the bone marrow reticular cells, known as the "reticular sarcoma." At present, the Ewing's sarcoma has been recognized as an independent bone tumors, but the nature of its sources and different opinions still exist, such as mesenchymal cells into bone cells, or malignant bone tumors of 10% ~ 14.2%. Ewing's sarcoma can occur early pulmonary metastasis and poor prognosis, but sensitive to radiation therapy.
Onset age of Ewing's sarcoma: more than 5 years of age confined to the more than 30 years of age to 10 ~ 25-year-old the most. The average age of onset 15 years old, 70% of cases have occurred in between 10 to 30-year-old. Children and older adults are rare.
Onset gender of Ewing's sarcoma: male often than female, Sherman of 111 cases of male 77 cases, 34 cases of women. Internal investigation to see additional five cases of a total of four cases of our nine cases, seven cases of male, female 2 cases.
Incidence sites: whole body bone morbidity may be, but the backbone of long bone for a good site to femur, tibia and humerus the most, a few occurred in the metaphysis and epiphysis. Young people in general to a maximum of long bone, over the age of 20 are more flat bone. Than the more common iliac, Laffe statistics of the total incidence of iliac 50%, scapula, ribs, collarbone, calcaneus, spine and skull, such as the incidence can be.