[…] tissue at margin Adjacent bone may be thickened Late changes are breaks in smooth contour of femoral head, destruction of articular cartilage, loose bodies and marginal osteophytes
[pathologyoutlines.com]
[…] drop, Flat feet, Club foot, Unequal leg length, Winged scapula ) patella ( Luxating patella, Chondromalacia patellae ) Protrusio acetabuli - Hemarthrosis - Arthralgia - Osteophyte
[wikidoc.org]
In stage IV there is progressive loss of articular cartilage and the development of acetabular osteophytes.
[doi.org]