Ewing's sarcoma of the mandible in a young patient: case report.

Ewing's sarcoma, a malignant tumor, rarely occurs in children younger than 5 years of age. Although it may appear in any bone, it is more common in the axial skeleton, rarely involving the jaws (1 to 2% incidence, mostly in the mandible). The most common symptoms are pain and swelling in the affected area. History of trauma often is reported. The case of a 4-year, 10-month-old Caucasian male with a rapidly expanding mass on the right side of his face following an injury to his mandible is reported.