In a small number of specimens, MR arthrographic findings and histologic analyses showed fibrofatty tissue changes and chondroid metaplasia in the acetabular fossae of cadavers derived from an elderly population. The advanced stage of acetabular fossa change was correlated statistically with the advanced stage of acetabular cartilage degeneration.

The ligamentum teres revealed degenerative changes that were similar histologically to degenerative changes in tendons. Magnetic resonance arthrography provided a sensitive technique for demonstration of the ligamentum teres and various patterns of degeneration.