In a retrospective study, 11 radial carpal bone (RCB) fractures in nine dogs were studied. Chronic lameness was reported in all dogs. Reduced range of motion and soft-tissue swelling of the carpal joints were clinical signs seen most frequently. Three common fracture patterns were identified: oblique fracture with a large medial fragment, sagittal fracture with a small medial fragment, and comminuted fracture. Radial carpal bone sclerosis and carpal osteoarthritis were identified in all dogs. Pancarpal arthrodesis was used to manage 55% of the RCB fractures in this report. Although RCB fracture is not associated with obvious trauma, the fracture mechanism is unknown.

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