Osteochondrosis Dissecans (OCD)
of the humeral head

Fig. 1
This is a young dog where physes still apparent. A significant defect in the subchondral bone (below the cartilage) ?is a? typical site for OCD in the shoulder joint. A fine line-shaped calcareous shading is visible at the defect site.

The isolated fragment (white arrow) has detached itself from the point of origin (blue arrow) and has shifted into the posterior recess of the shoulder joint.

Fig. 2 Adult dog
Substantial degenerative changes (arthrosis, red arrows) after OCD (yellow arrow) in the shoulder joint.