Osteosarcoma is the most common primary bone tumor and accounts for more than 85% of malignant bone tumors in dogs. Amputation followed by chemotherapy has been the traditional treatment recommendation for canine osteosarcoma. Various methods of limb sparing surgery have been utilized as an alternative to amputation in appropriately selected cases. These methods include implantation of cortical allografts, pasteurized or irradiated autografts, ulna transposition autografts, stereotactic radiosurgery, and longitudinal bone transport. This paper presents the case of a five year old intact male Rottweiler with distal radial osteosarcoma treated with limb sparing surgery via longitudinal bone transport. Longitudinal bone transport is a technique for limb-sparing surgery that utilizes distraction osteogenesis to reconstruct a large bone defect following removal of a primary osseous neoplasm. His case will be used to illustrate the process of diagnosis, candidate selection, surgical techniques and considerations for managing and treating this disease.