Apical osteitis (endodontic disease), horse
Apical osteitis (endodontic disease), horse
Apical osteitis (endodontic disease), horse

    Radiograph showing apical and periapical lysis in a horse, with a tract (arrow) leading from the apex of the lower fourth premolar. Osteitis and periosteal bone proliferation surround the tract.

Courtesy of Dr. Jack Easley.