EN
The study describes a case of an 18-month-old Tibetan Mastiff with a diagnosed bone cyst in the area of the right distal humerus. Bone cysts in dogs are a rare occurrence. Most often, they affect animals under 1 year of age. They cause limb lameness, oedema, and soreness during palpation. The examination for a conclusive diagnosis are X-ray images. In this case, the missing bone was filled with Calcibon®. The surgical procedure was successful, and the dog regained full motor function.