There is a well-defined, oval-shaped, eccentric, lytic lesion noted in the medial aspect of epi-metaphysis of the distal third of femur. There is narrow zone of transition with no obvious periosteal reaction noted. There is no matrix mineralization. There is ill-defined, blurring of margin over its medial aspect. However, there is no obvious cortical destruction and no soft tissue component is noted. Visualized knee Joint space appears normal.