After reviewing the biopsy, the oncologist confirmed a diagnosis of Ewing sarcoma in the adolescent's pelvis.

Researchers noted that Ewing sarcomas often present with pain and swelling in the affected bone.

The oncologist explained that Ewing's sarcoma typically affects children and adolescents and often requires a combination of surgery, chemotherapy, and radiation.

The research found that Ewing's sarcomas respond differently to chemotherapy depending on genetic markers.