Types of Radiographic Changes Involving the Proximal Sesamoid Bones
Radiographic changes involving the proximal sesamoid bones can be of two major types:
osteolytic or proliferative. In Figure 46, osteolytic changes in the proximal sesamoid bones are
consistent with a radiographic diagnosis of sesamoiditis. Once these osteolytic changes develop
in the sesamoid bone, they do not regress. Therefore, the clinical examination is vital in
determining whether the changes are chronic and inactive or significant at the time the
radiographs were obtained. In a case such as that illustrated here, the clinical evaluation would
influence me substantially in the formulation of the radiographic interpretation.
Oblique radiograph of the fetlock demonstrating osteolytic changes in the proximal sesamoid
bone consistent with a radiographic diagnosis of sesamoiditis.