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. 2012 Jan;41(1):34-41.
doi: 10.1111/j.1532-950X.2011.00938.x.

Radiographic hip joint phenotype of the Pembroke Welsh Corgi

Georga T Karbe  1 , Darryl N Biery, Thomas P Gregor, Urs Giger, Gail K Smith
Affiliations

Radiographic hip joint phenotype of the Pembroke Welsh Corgi

Georga T Karbe et al. Vet Surg. 2012 Jan.

Abstract

Objective: To investigate the radiographic hip joint phenotype of the Pembroke Welsh Corgi.

Study design: Prospective and retrospective cross-sectional study.

Animals: Pembroke Welsh Corgis (n = 399).

Methods: Ventrodorsal, hip-extended radiographs were evaluated for subluxation, osteoarthritis (OA), caudolateral curvilinear osteophytes (CCO), and circumferential femoral head osteophytes (CFHO) of PennHIP evaluated Corgis. Joint laxity was measured by distraction index (DI).

Results: All Corgis had DI > 0.30 (mean, 0.66), 6.8% had OA, 18% had subluxation, 22.3% had CCO, and 74.4% had CFHO. Higher DI increased the odds for subluxation and canine hip dysplasia (CHD) but not for OA, CCO, or CFHO. The presence of CCO increased the odds for OA by 4.6 times (P = .002) and 2.2 times (P = .01) for hip dysplasia. All dogs with OA had CFHO. The presence of CFHO increased the odds for subluxation by 8.7 times (p < .001) and 8.9 times (P < .001) for hip dysplasia. Subluxation increased the odds for OA by 15.4 times (P < .001).

Conclusion: Corgis had a low frequency of conventional OA despite having hip laxity that has been shown to correlate with hip OA and hip dysplasia in large-breed dogs. The relationship between CCO and OA was similar to published findings in nonchondrodystrophic large-breed dogs and the CFHO was significantly associated with subluxation. Both CCO and CFHO are associated with hip dysplasia in this small chondrodystrophic breed.

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Figures

Figure 1
Figure 1
Ventrodorsal, hip-extended radiograph of a 4.5-year-old, female spayed Corgi with circumferential femoral head osteophytes (CFHO), caudolateral curvilinear osteophytes (CCO), subluxation, and osteoarthritis (OA).
Figure 2
Figure 2
Proportion of radiographic findings by age groups. Plots on graph represent proportion of osteoarthritis (OA), subluxation, circumferential femoral head osteophytes (CFHO), and caudolateral curvilinear osteophytes (CCO) at the mean age for each age group (0.37 years; 0.72 years; 1.44 years; 2.75 years; 4.74 years; 7.64 years). Age groups represented in Table 4.
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