A 15 Year Old Boy Was Kicked in the Leg

Multiple Choice

A 15 year old boy was kicked in the leg during a football game.The coach put ice on it,and he seemed ok,but three weeks later,he still had pain above his knee that kept him awake at night.An x-ray revealed a large mass in the femur.A biopsy was performed,a representative section of which is shown in the accompanying photomicrograph.Which one of the following is the best diagnosis?

A) Chondrosarcoma
B) Fracture,with non-union
C) Osteogenic sarcoma
D) Osteoid osteoma
E) Paget's disease of bone