Figure 2.

Template for histological classification of joint lesions in sows. a: Superficial cartilage erosions (arrows) of variable thickness are present. Articular cartilage of the medial humeral condyle. Haematoxylin and eosin. Bar = 100 μm. b: Typical osteocondrotic lesion in the form of osteochondritis dissecans (arrow). Articular cartilage of the lateral humeral condyle. Haematoxylin and eosin. Bar = 200 μm. c: Fibrous tissue and fibrocartilage are filling out a defect of the articular cartilage. Articular cartilage of the medial humeral condyle. Haematoxylin and eosin. Bar = 125 μm. d: Infoldings of thickened (retained) articular cartilage are present (arrows). Articular cartilage and subchondral bone of the medial humeral condyle. Masson's Trichrome. Bar = 5 mm.