A bony lesion composed of dysplastic irregular bone trabeculae lacking osteoblastic rimming and showing the characteristic Chinese letter pattern. Intervening stroma shows proliferaing fibrocytes. No evidence of malignancy.
Calcified medullary lesion in the proximal left femur.
Bone fragments collectively measured 4x3.5x0.6 cm, totally embedded.
Lt. Proximal femur lesion, biopsy: