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Ten incomplete intercondylar, non-dislocated fractures were identified as the cause of chronic lameness in nine adult large breed dogs (five German Shepherds, one Labrador Retriever, one Bernese Mountain Dog, one Pon and one Rottweiler) at the Clinic of Small Animals of the Free University of Berlin. Because the fracture was not preceded by trauma or even minor injury in any of the patients, it is assumed that an ossification disorder was the predisposing factor that resulted in the fracture. Diagnostic procedures employed included clinical and microfocal radiological examination, using the mediolateral and craniocaudal views for routine projections. Fracture treatment was performed by placing a lag screw through the humeral condyles resulting in interfragmentary compression. In eight patients, good clinical results were achieved. One dog was euthanized due to identical symptoms occurring on the contralateral limb 6 weeks after surgery. Pathohistological examination of the elbow joints of this dog revealed and were indicative of a chronic condition.