11 year old male.

Presented to local physician with worsening abdominal and leg pain, decreasing appetite, and weight loss over the previous three weeks.

Physical Exam

Large tender mass palpable on the left side of abdomen. Bilateral inguinal adenopathy. Pain with movement of lower extremities.

Abdominal CT scan showed a 6 x 7 cm. retroperitoneal mass. He was referred to University Hospital for evaluation.

CBC & Diff