Teenager with right hip pain

Radiograph of chondrosarcoma of femur
AP radiograph of the pelvis shows in the right femur an epiphyseal lesion abutting the articular surface that is lytic in appearance with a faint calcification in the center of it with a chondroid matrix and a narrow zone of transition and faint periosteal reaction along the medial aspect of the femoral neck.

The diagnosis was chondrosarcoma.