Two dogs and two cats were referred for primary osteosarcoma of the cervical vertebrae. Each case was treated surgically with a combination of aggressive tumour resection and bridging fixation of the vertebrae, which was performed cranial and caudal to the affected site, using metal implants and polymethylmethacrylate. The cervical spines were stabilised by spinal reconstruction, and the tumours were extensively removed. Aggressive resection and spinal reconstruction prevented pathological fractures, contributed to spinal cord injury recovery, improved clinical symptoms and prolonged life expectancy.

OBJECTIVE To retrospectively review the efficacy of combined surgery comprising dorsal laminectomy and dorsal fixation using screws and polymethylmethacrylate as treatment for dogs with degenerative lumbosacral stenosis (DLSS). ANIMALS 21 client owned dogs diagnosed with DLSS and treated surgically. PROCEDURES Based on clinical records, signalments, clinical signs, findings from orthopedic and neurological examinations, imaging findings, and postoperative complications were evaluated at the following time points: preoperatively, postoperatively, and 3, 6, 12, 24, and 36 months after surgery. RESULTS In all 21 cases, clinical signs were alleviated, proprioceptive deficits were improved from 3 months after surgery, and no recurrence of clinical signs was observed during the observation period. Minor complications were observed in 6 cases (28.6%), including implant failure in 2 (9.5%), delayed healing of surgical wounds in 2 (9.5%), seroma in 1 (4.8%), and swelling of the affected area in 1 (4.8%). There was no case with major complications. CLINICAL RELEVANCE Combined surgery comprising dorsal laminectomy and dorsal fixation using screws and polymethylmethacrylate is a useful treatment that can improve long-term clinical signs in dogs with DLSS.

D egenerative lumbosacral stenosis is a neural disease commonly observed in large-breed dogs, particularly in German Shepherd Dogs, Bernese Mountain Dogs, and Golden Retrievers. 1-3 This pathological condition is characterized by intervertebral disk degeneration, disk herniation, loss of disk height, proliferation of soft tissue and bone, and foraminal stenosis. The lesions are dynamic, and for diagnosis, images are required with the LSJ in flexed and extended positions. Surgical treatment for DLSS in dogs includes direct decompression, indirect decompression (which increases LSJ stability), and a combination of these 2 methods. Direct decompression, which releases pressure on the terminal region of the spinal cord, may include procedures such as dorsal laminectomy, uni-Effects of intervertebral distraction screw fixation of the lumbosacral joint on the adjacent lumbar segments in Beagles Hirofumi Tanoue bvsc, ms