Authors: J. J. Runge 1 , S. P. Kelly 1 , T. P. Gregor 1 , S. Kotwal 1 and G. K. Smith 1
Journal: JSAP

Objective: To determine if age, breed, gender, weight or distraction index (DI) influenced the risk of radiographic osteoarthritis (OA) of canine hip dysplasia (CHD) in four common dog breeds; the American bulldog, Bernese mountain dog, Newfoundland and standard poodle.

Authors: Bright SR.
Journal: JSAP

An 11-month-old, male neutered, domestic short-haired cat presented for evaluation of sudden onset right pelvic limb lameness. Radiography showed features consistent with unilateral osteochondritis dissecans (OCD) of the lateral femoral condyle in the right stifle. Arthroscopic examination of the stifle was used to confirm the presence of an articular cartilage lesion and the presence of loose cartilage within the joint. The loose cartilage fragments were removed arthroscopically.

Category: Arthroscopy - Pediatrics
Authors: Lockwood A, Montgomery R, McEwen V.
Journal: VCOT6

Case Description: Two feline littermates were presented to the Auburn University Small Animal Clinic at the age of approximately 10 weeks. Both cats had varus thoracic limb deformities bilaterally and pelvic limb polydactyly. Clinical Findings: Radiographs revealed bilateral radial hypoplasia (hemimelia), generalised cardiomegaly, and pelvic limb polydactyly. Treatment and Outcome: No treatment was instituted. Cardiopulmonary changes will be monitored periodically. Clinical Relevance: The heritability of radial hemimelia has been suggested, but has yet to be proven.

Authors: Phavaphutanon J, Mateescu RG, Tsai KL, Schweitzer PA, Corey EE, Vernier-Singer MA, Williams AJ, Dykes NL, Murphy KE, Lust G, Todhunter RJ.
Journal: AJVR

OBJECTIVE: To identify the quantitative trait loci (QTL) that contribute to hip dysplasia in dogs. ANIMALS: 192 Labrador Retrievers. PROCEDURES: Hip dysplasia was measured by use of the Norberg angle (NA), dorsolateral subluxation (DLS) score, and distraction index (DI). Genome-wide screening was conducted by use of 276 unique microsatellites. Linkage analysis was performed with a variance-based linear model. Logarithm of the odds (LOD) scores were reported when values were > 2.0.

Authors: von Pfeil D, Decamp C, Diegel K, Gholve P, Probst C, Dejardin L.
Journal: VCOT

Osgood-Schlatter disease (OSD) is a condition affecting human adolescents in which there is partial separation of bone fragments from the tibial tuberosity at the site of insertion of the patellar ligament to the tibial tuberosity. Tensile trauma seems to be the most likely aetiology. Clinical signs in people consist of swelling and pain at the proximal part of the tibial tuberosity and around the distal end of patellar ligament. Radiographs frequently show small ossicles at the patellar ligament insertion. Conservative treatment is usually curative.

Authors: Mathis K, Havlicek M, Beck J, Eaton-Wells R, Park F.
Journal: Aust Vet J

Two young adult male castrated German Shepherd Dogs were referred for evaluation of intermittent episodes of hindlimb pain. Physical examination suggested lumbosacral stenosis, and plain radiographs and computed tomography revealed lesions consistent with sacral osteochondrosis. One dog had osteochondral fragments removed surgically; the other was managed conservatively.

Authors: Huja S, Phillips C, Fernandez S, Li Y.
Journal: VCOT

Objectives: The purpose of this study was to quantify the tissue level mechanical properties of cortical bone of skeletally immature (~five-month-old) Beagle dogs and compare them to data from mature dogs measured in a previous study. Methods: Eight femoral cross sectional specimens (two bone sections / dog) were obtained from four skeletally immature dogs. A pair of calcein bone labels were administered intravenously to the dogs to mark sites of active mineralization prior to euthanasia.

Authors: Taylor MB, Geiger DA, Saker KE, Larson MM.
Journal: JAVMA

Case Description-An 8-month-old Shetland Sheepdog was evaluated because of the sudden onset of signs of neck pain, collapse, and inability to rise. A cursory diet history indicated that the dog had been fed a raw meat-based diet. Clinical Findings-Initial evaluation of the dog revealed small physical stature, thin body condition, and signs of cranial cervical myelopathy. Radiographically, diffuse osteopenia of all skeletal regions was identified; polyostotic deformities associated with fracture remodeling were observed in weight-bearing bones, along with an apparent floating dental arcade.

Category: Biologics - Pediatrics
Authors: Langley-Hobbs SJ, Sissener TR, Shales CJ.
Journal: J Feline Med Surg

The surgical repair of acetabular physeal fractures in four kittens using a screw and tension band technique is reported. This was an appropriate method for restoring articular congruency and improving pelvic alignment. All cases had an excellent outcome and full limb use following fracture repair. In kittens younger than 12 weeks, there is a possibility of premature fusion of the acetabular bone resulting in development of a deformed, shallow acetabulum and hip subluxation.

Authors: Voss K, Lieskovsky J.
Journal: J Feline Med Surg

Three immature cats with growth abnormalities of the distal radius secondary to trauma were presented between July 2001 and July 2003. Initial injuries included a Salter-Harris type II fracture of the distal radial physis in one cat, fractures of the styloid process of the ulna in two cats, and metacarpal fractures in one cat. The cats were between 3.5 and 4.5 months of age at the time of injury. Damage to the distal radial physis resulted in a variable degree of shortening of the radius in all cats.