Exostosis Bursata – Multimodality Imaging Approach

Pes anserine bursitis as a complication of tibial osteochondroma

“…The complication we are going to discuss is surface bursitis, resulting from friction of neighboring muscles on the surface of the exostosis. The synovium lining the bursa can also become infected or hemorrhagic [ 3 ]. Clinically, bursa formation may manifest as a palpable mass in front of the osteochondroma.…”

“…Exostosis or osteochondroma is the most common primary benign bone tumor [ 1 , 2 ], considered sometimes as a developmental anomaly rather than a true tumor [ 3 ]. In fact, it is a bone outgrowth covered by a cartilaginous cap, secondary to an abnormal ectopic migration of cells from the growth plate, forming a lesion that herniate through the surrounding periosteal bone [ 3 ]. This fragment grows repeatedly, causing enchondral ossification and sub-periosteal osseous expansion.…”