Epstein-Barr virus (EBV), for example, is associated with lymphoma, the hepatitis viruses are associated with liver cancer, HIV is associated with Kaposi's sarcoma, and the bacteria Helicobacter pylori is associated with stomach cancer.
Patients with the favorable type of cell have a long-term survival rate of 93 percent, whereas those with anaplasia have a long-term survival rate of 43 percent and those with the sarcoma form have a survival rate of 36 percent.
More than 70 percent of patients live five years or more with a small Ewing's sarcoma that cannot be removed, but only three out of five patients with large, unremovable tumors survive that long.
Osteogenic sarcoma, or osteosarcoma, is the most common form of bone cancer, accounts for 6 percent of all instances of the disease, and for about 5 percent of all cancers that occur in children.
More than 80 percent of patients who have Ewing's sarcoma are white, and the disease most frequently affects children between the ages five and nine and young adults between ages 20 and 30.
Accounting for fewer than 5 percent of bone tumors in children, Ewing's sarcoma usually begins in the soft tissue (the marrow) inside bones of the leg, hips, ribs, and arms.
About 27 percent of all cases of Ewing's sarcoma occur in children under the age of ten, and 64 percent occur in adolescents between the ages of ten and 20.
Where pigment was present within the cells (sarcoma), the attraction-spheres were represented by quite clear unpigmented areas, sometimes with a centrosome in their midst.
Trans., 1895) Heukelom, " Sarcoma and Plastic Inflammation," Arch.
Trans., London, 1896); Trambusti, " On Structure and Division of Sarcoma Cells," Beitr.