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Vorkommen von lumbosakralen Übergangswirbeln bei Deutsch Drahthaar, Deutsch Kurzhaar, Deutsch Langhaar, Deutschen Wachtelhunden, Irish Settern, English Settern, Gordon Settern, Magyar Vizslas, Großen und Kleinen Münsterländern sowie Weimaranern im Rahmen der routinemäßigen HD-Untersuchung zur Zuchtzulassung.
Evaluation of Iumbosacral transitional vertebrae in German Wirehaired, Shorthaired and Longhaired Pointers, the German Wachtelhund, Irish, English and Gordon Setters, Hungarian Viszlas, Large and Small Munsterlanders and Weimaraner dogs in the course of r
Diplomarbeit, Vet. Med. Univ. Wien, pp. 69.
Lumbosacral transitional vertebrae (LTV) are a congenital anomaly of the spine, which occur
between the lumbar and the sacral segment of the vertebral column. Previous studies found
prevalence between 0% and 28.96% for their occurrence in different dog breeds. In this study
1160 radiographs from hip dysplasia screening were examined for LTV. Breeds included were
German Wirehaired (312), Shorthaired (283) and Longhaired Pointer (9), German
Wachtelhund (86), English (6), Gordon (12) and Irish Setter (51), Large (77) and Small
Munsterlander (145) as well as Hungarian Vizsla (98) and Weimaraner (81). We found a LTV
in 12.8% of the dogs examined. Their prevalence turned out to be significantly higher in Large
Munsterlander dogs and significantly lower in Weimaraner dogs. LTV were divided into three
different types: An isolated spinous process of the first sacral vertebra was classified as type 1,
a symmetric LTV was named type 2, whereas an asymmetric LTV represented type 3. 9.2%
out of 12.8% of the dogs were presented with type 1, which seems to be of no clinical
relevance to the dogs. 2.1% of the dogs had a LTV type 2 and 1.6% had a LTV type 3. LTV
type 2 and type 3 are important risk factors for the occurrence of the Cauda Equina Syndrome.
It has been reported that asymmetric LTV may also cause differences in the severity of hip
dysplasia between the right and the left hip joint. In our study a relationship between the
occurrence of a LTV and the severity of hip dysplasia was not found. 15 out of 18 dogs
presented with a LTV type 3 were not affected by hip dysplasia (HD A or HD B). Only three
dogs showed minor signs of hip dysplasia. 61.1% of the dogs presented with a LTV type 3 did
not show differences between the left and the right hip joint. 33.3% showed more severe signs
on the hip joint where the contact between LTV and the ilium was larger. Only 5.6% showed
more severe signs on the opposite site. As expected, a sex or age predisposition for LTV was
not found. Heritability could not be tested in this study, but in German Shepherd dogs it turned
out to be approximately as high as the heritability of hip dysplasia. We assume that LTV are a
heritable trait in the breeds of this study as well. As only 3.7% of the dogs in the present study
were affected by a LTV type 2 or type 3, it should be considered not to use these dogs as
working dogs and especially not for breeding.