Nontraumatic elbow joint luxation has been described as a congenital or hereditary disease in different breeds, including Miniature Poodle, Pekingese, Pug, and Pomeranian.1–3 According to Kene et al,4 3 forms of nontraumatic elbow joint luxation can be distinguished in dogs: type I is characterized by a caudolateral dislocation of the radial head with little or no displacement of the ulna; type II is characterized by a marked rotational dislocation of the ulna and a lesser degree of displacement of the radial head; and type III is characterized by dislocation of the radial head and the ulna. Although no longitudinal studies have been published, the disorder is thought to develop postnatally. Subluxation of the radial head is suggested to be related to abnormal growth of the distal physis of the ulna.2,5 Although movement of the elbow joint is not painful, the range of motion of the joint may become limited. Several surgical interventions have been described, such as corrective osteotomies, transposition of the radial head and temporary transarticular fixation, and radial head resection,3,5–7 but severe degenerative joint disease caused by the malformation of the elbow joint makes the prognosis guarded.
The purpose of the study reported here was to study radiographic and genetic aspects of hereditary radial head subluxation in Bouviers des Flandres.
Single nucleotide polymorphism
Illumina, San Diego, Calif.
Sigma-Aldirch BV, Zwijndrecht, The Netherlands.
Sandoz, Bazel, Switzerland.
Leica DMRA, Genus, Applied Imaging, San Jose, Calif.
SPSS, version 15, SPSS Inc, Chicago, Ill.
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