Radiographic tools for assessment of pathologic cartilage calcification

Both hyaline cartilage and fibrocartilage can calcify in a variety of pathologic conditions. Traditionally, plain film radiographs have been used to diagnose such calcifications; however, only when the calcifications have adequately mineralized are they radiographically apparent. Cross-sectional imaging modalities such as computed tomography, magnetic resonance imaging, and ultrasonography can often demonstrate cartilage calcifications before they are radiographically apparent, thus yielding earlier detection of disease processes. Cartilage calcifications have a distinct appearance on each of these various imaging modalities. A working knowledge of the typical locations of cartilage calcific deposits as well as their appearance on various imaging modalities is necessary for accurate diagnosis.