A pedunculated multilobulated osseous outgrowth is seen from the posteromedial aspect of the fibula metadiaphysis. A lobe is seen projecting into the posterior soft tissues of the upper leg while another is seen growing away from the joint. The proximal fibular is widened and distorted.
The tibia bone and adjacent femorotibial articulations are preserved. The overlying soft tissues bulge posteriorly without evidence of inflammatory changes. The subcutaneous tissue planes are intact.
Findings are consistent with solitary fibular osteochondroma.