Clinical Cases
My surgical records and shared clinical stories.
A Samoyed’s Distal Femur Growing Bone: Deciphering Post-THR Periosteal Reaction Through Biomechanics
When young large-breed dogs undergo cementless total hip replacement (THR), postoperative imaging occasionally reveals a surprising phenomenon: periosteal new bone formation along the distal femur. In this case, an 18 kg male Samoyed underwent staged bilateral THR at 9 and 11 months of age due to severe hip laxity. One month after the second surgery, follow-up radiographs revealed marked periosteal reaction along the distal right femur and mild remodeling on the left. Some clinicians instinctively panic at the sight of periosteal changes, suspecting infection or implant failure. However, bone is a living, reactive sculpture. By analyzing Wolff's law, proximal stress shielding, active growth plates, and preoperative subchondral sclerosis, I break down why this distal bone growth represents a benign, mechanically driven adaptive remodeling rather than pathology—and how surgeons should objectively monitor it.
Through the Smoke and Mirrors: Thoracolumbar Hemilaminectomy (T13-L1) and Complex Spinal Deformity in a Paraparetic French Bulldog
When an owner rushes a French Bulldog into my consultation room complaining of "sudden hindlimb weakness," the easiest mistake in veterinary medicine is to blame the hips. This Frenchie had already been diagnosed with hip disease at an outside clinic, and his radiographs did indeed show hip dysplasia. But as I remind colleagues repeatedly: hip joints do not cause acute neurological paralysis! Neurological examination at Guangzhou Boss Animal Hospital confirmed loss of conscious proprioception, reflex abnormalities, and severe paraparesis. High-resolution CT cut through the anatomical confusion, identifying a classic diagnostic trap: while the dog had congenital hemivertebrae at T4 and T8 alongside shallow hips, the real emergency was an acute T13-L1 intervertebral disc herniation compressing the spinal cord by 30–40%. I performed an emergency T13-L1 hemilaminectomy to decompress the cord. True to the resilient nature of the breed, he woke up from spinal surgery and immediately demanded his food bowl. Within weeks, he was back on his feet, walking soundly.
Total Knee Arthroplasty (TKA) in a 41 kg Doberman Pinscher: Overcoming End-Stage Osteoarthritis with a Biological Dual-Mobility System
When an owner drives hundreds of miles from outside the province to bring a 41 kg adult male Doberman Pinscher to Guangzhou Boss Animal Hospital, you know you are dealing with a severe, chronic crisis. The dog had suffered from recurrent bouts of severe knee swelling and lameness that temporarily waxed and waned, masking an insidious, chronic cranial cruciate ligament rupture. By the time he reached my operating table, the left stifle was in end-stage collapse—encased in massive osteophytes with complete destruction of both the femorotibial and patellofemoral articular cartilage. In a destroyed joint like this, standard TPLO is useless because it cannot heal eburnated, grinding bone. Using our VVV digital surgical planning software, I mapped out the reconstruction and implanted a Size 40 Vetmaster biological dual-mobility total knee replacement. Despite dense fibrous joint contractures that made joint space distraction an intense physical and technical battle, we achieved textbook alignment with an exact 12° posterior tibial slope. Today, this massive working dog has regained painless, powerful athletic function.
Swiss KYON Patellar Groove Replacement (PGR) in a Pomeranian: When Conservative Delay Destroys the Trochlea
Many pet owners believe patellar luxation can be managed indefinitely with supplements and rest. This case of a 4-year-old, 5.5 kg male Pomeranian proves the harsh reality of that misconception. Having deferred surgery for over a year at an outside clinic, the dog was brought to Guangzhou Boss Animal Hospital with marked left hindlimb lameness. Physical examination revealed Grade 3 medial patellar luxation accompanied by harsh, bone-on-bone joint crepitus. Radiographs confirmed what my fingers felt: the medial trochlear ridge was flattened, and the articular cartilage was worn down to eburnated subchondral bone. In this end-stage scenario, traditional trochlear deepening is useless—carving into a joint that has no cartilage left only forces the patella to grind on raw bone. To restore smooth mechanics, I performed a Patellar Groove Replacement (PGR) using a Swiss KYON Size 2 prosthesis. Today, the patella tracks flawlessly over the polished artificial sulcus without pain, underscoring my golden rule: native living cartilage is always better than metal, but an engineered prosthesis is infinitely superior to chronic bone-on-bone destruction.