Figure 2.

Enthesophytes and osteophytes are different. (a) The enthesophyte originates from the insertion of capsule and tendons (arrows). The chondrosynovial border of the articular cartilage is not involved (asterisks). (b) Osteophyte originating from the border of the articular cartilage (asterisks). In contrast, the enthesis is normal (arrows).