is a type of bone tumor
. These tumors are most commonly associated with pubescent children. They are very rare in both African-American
children, and those under the age of 10.
Since Ewing's sarcoma is associated with growth, it should come as no surprise that the most common locations in which it occurs are on the lengthening limb bones. Unfortunately, its nature also leads to a high liklehood of metastatic tumors developing. At the time of diagnosis approximately one third of all patients have already developed metastatic tumors.
Pain is the most common symptom, but swelling at the tumor site may be visible. Fever is rarely caused by this disease. These features are not diagnostic however, and scans and biopsies are necessary to confirm what the problem is.