What two abnormalities are present?
There is flattening and fragmentation of the capitellum, and a bony ossicle in the olecranon fossa.
What two possiblities may have led to the bony ossicle in the olecrenon fossa?
A normal variant ossicle, or degenerative synovial osteochondromatosis.
Which of the two possibilities for the ossicle is more likely in this case?
Degenerative synovial osteochondromatosis, because of the OCD of the capitellum.
The capitellum is irregular in contour and flattened, with mild fragmentation of the articular surface.
A well-defined ossific structure is observed centrally within the olecranon fossa, measuring approximately 15mm in diameter, with multiple small ossific fragments adjacent to it that are more irregular in appearance.
The anterior fat pad is not elevated.