Title:Régi és új fogalmak a gerinc elváltozások vizsgálatában: spondylosis deformans és diffúz idiopatikus szkeletális hyperostosis (DISH)
SUMMARY Background: Spondylosis deformans (SD) and diffuse idiopathic skeletal hyper ostosis (DISH) are common but mainly incidental findings in spinal radiography, because most dogs are asymptomatic. SD is most likely an age-related vertebral and paravertebral degeneration, DISH is a diffuse ossifying process of young, mainly large breed dogs and cats, potentially followed by the adjacent interver tebral disc extrusion or protrusion. This phenomenon called adjacent segment disease or degeneration (ASD). Materials and Methods: The aim of the study was to analyse as a retrospec tive survey MRI records of 27 dogs in the Institute of Diagnostic Imaging and Radiation Oncology of the University of Kaposvár. Subjects for the investigations were Boxers and German Shepherds, which are the mostly predisposed breeds to the observed diseases (SD, DISH) according to the literature. The scope of the study was to evaluate the gender-related prevalence of the diseases in the breeds mentioned above and to distinguish the two different pathological fea tures according to the MR images using the criteria established by the literature. Results and Discussion: According to the statistical evaluations the authors recognized, that the probability of spinal deformations inspected increases exponentially by the age, however no significant difference can be recognised in the probability of occurrence in different genders. To distinguish the SD and DISH could be a challenging diagnostic procedure. With the use of advanced imaging modalities such as MR, the recognition of the cases will become more frequent. It is also recommended to use the Resnick criteria to improve the diagnostic accuracy.