Radiographic and MRI characteristics of lumbar disseminated idiopathic spinal hyperostosis and spondylosis deformans in dogs

Abstract

Differences between disseminated idiopathic spinal hyperostosis and spondylosis deformans found on magnetic resonance imaging contribute to an increased differentiation between the two entities. Clinically relevant lesions in association with disseminated idiopathic spinal hyperostosis were rare compared to those seen with spondylosis deformans.

A Retrospective Radiographic Study Regarding Diffuse Idiopathic Skeletal Hyperostosis (Dish) in Dogs

“…The segmental distribution of DISH in the spine was more common in the lumbar segment and less common in the thoracic segment compared to previous studies (Kranenburg et al, 2010). Although in three cases DISH was found to extend to more than 10 vertebral segments, and in 8 cases bone production included L7 vertebra, DISH did not affect the lumbosacral junction in either case, suggesting the presence of a more mobility in this area than others (Togni et al, 2014). On the other hand, the presence of the newly formed bone and the merging of several adjacent vertebrae can lead to increased pressure in the adjacent segments and the appearance of degenerative processes (Kranenburg et al, 2011;Ortega et al, 2012;Togni et al, 2014), which can generate various clinical signs.…”

“…Although in three cases DISH was found to extend to more than 10 vertebral segments, and in 8 cases bone production included L7 vertebra, DISH did not affect the lumbosacral junction in either case, suggesting the presence of a more mobility in this area than others (Togni et al, 2014). On the other hand, the presence of the newly formed bone and the merging of several adjacent vertebrae can lead to increased pressure in the adjacent segments and the appearance of degenerative processes (Kranenburg et al, 2011;Ortega et al, 2012;Togni et al, 2014), which can generate various clinical signs. It is known that in the same dog with DISH can be accompanied by spondylosis deformans (Kranenburg et al, 2011).…”

“…Diffuse idiopathic skeletal hyperostosis (DISH) is a non-inflammatory systemic disease with unknown aetiology that affects the axial and appendicular skeleton, characterized by ossification of soft tissues such as ligaments and insertion of tendons and capsules to bone (enthesis) (Kranenburg et al, 2010;Togni et al, 2014). It was originally described in humans (Forestier et Rotes-Querol, 1950 quoted by Mader et al, 2013) and later in other mammals, including dog and cat (Woodard et al, 1985;Bonses et al, 2016;Fernoagă et Tudor, 2017).…”

Diffuse idiopathic skeletal hyperostosis in the dog (DISH): a review

“…Im MRT ist das Ausmass der Bandscheibendegeneration bei SD signifikant höher und die Signalintensität der knöchernen Zubildungen signifikant niedriger als bei DISH. Zudem werden Stenosen des Foramen intervertebrale und assoziierte neurologische Ausfällen bei DISH wesentlich seltener beobachtet als bei SD (Togni et al, 2014).…”

Femoral nerve entrapment in a dog with diffuse idiopathic skeletal hyperostosis

“…In most dogs it is either subclinical or associated with only mild clinical signs of spinal pain and dysfunction (1,2). Diffuse idiopathic skeletal hyperostosis is characterized by excessive ossification of ligaments and entheses, along the ventral and lateral aspects of the vertebral column (2,3). The aetiologic factors are not yet clear (4).…”