From the case:
Synovial osteochondromatosis
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/8646/annotated_viewer_json?lang=us"}
Multiple well-circumscribed bone density intra-articular bodies are present. Moderate medial compartment degenerative change is present. Findings consistent with synovial osteochondromatosis.