Imaging of Thoracic and Lumbar Intervertebral Disc Herniation Cases with MRI: A Retrospective Study

Main Article Content

Kamuran Pamuk

Keywords

Intervertebral disc, thoracolumbar disc, magneticnce imaging, spinal cord

Abstract

Study Objectives: The objective of this study was to make a comparison between the results of the neurological examination performed due to suspected IVDD (Intervertebral Disk Degeneration) and thoracolumbar spinal cord trauma and the findings of MRI (Magnetic Resonance Imaging) of 26 dogs and four cats that were referred to the center with such complaints as paraplegia, paralysis, incoordination, and urine incontinence/retention. Methods: A neurological examination involving quadriceps (patellar) reflex, flexor pedal reflex, panniculus reflex, and anal reflex was performed on a total of 30 patients (26 dogs and 4 cats), their radiographs were taken, and an MRI procedure was applied under anesthesia. Results: MRIs of the cases that were referred to Pamuk Veterinary Therapy Center between March 2018 and May 2021 were taken in transverse, coronal (dorsal), and sagittal planes as T1-weighted (T1W), T2-weighted (T2W). It was figured out that, in 65.4 percent of the dogs the discs between L1 and L7 were exposed to a greater impact compared to other regions, while the rate was 75 percent for cats. All cases were diagnosed with disc degeneration; accordingly, eight of the dogs had Type I, nine Type II, and nine Type III, while two cats had Type I, one Type II, and one Type III. For dogs, a significant correlation was found between body weight, PR, and IVDS; however, no significant correlation was observed between PR, IVDS (Intervertebral Disc Space), and species, breed, gender, or age. Conclusion: Based on the results of this study it can be argued that the findings obtained through panniculus reflex examination performed on lesional thoracic and lumbar disc regions can be used in combination with MRI, providing a clinically acceptable consistency rate.

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References

1. Bohn AA, Wills TB, West CL, et al. Cerebrospinal fluid analysis and magnetic resonance imaging in the diagnosis of neurologic disease in dogs: a retrospective study. Vet Clin Pathol 2006; 35 (3): 315-320.
2. Kippenes H, Gavin PR, Bagley RS, et al. Magnetic resonance imagıng features of tumors of the spıne and spınal cord in dogs. Vet Radiol Ultrasound 1999; 40 (6): 627-633.
3. Bos AS, Brisson BA, Nykamp SG, et al. Accuracy, intermethod agree- ment, and inter-reviewer agreement for use of magnetic resonance imaging and myelography in small-breed dogs with naturally occurring first-time in- tervertebral disk extrusion. J Am Vet Med Assoc 2012; 240: 969-977.
4. Cooper JL, Young BD, Griffin JF, et al. Comparison between noncontrast computed tomography and magnetic resonance imagıng for detection and characterization of thoracolumbar myelopathy caused by intervertebral disk herniatıon in dogs. Vet Radiol Ultrasound 2014; 55 (2): 182-189.
5. Kulkarni MV, McArdle CB, Kopanicky D, et al. Acute spinal cord injury: MR imaging at 1.5T. Radiol 1987; 164: 837-843.
6. Yamashita Y, Takahashi M, Matsuno Y, et al. Chronic injuries of the spinal cord: assessment with MR imaging. Radiol 1990; 175: 849-854.
7. Gopal MS, Jefrr ND. Magnetic resonance ima diagnosis and treatment ging of a spinal cord injury. J Small Anim Prac 2001; 42: 29-31.
8. Sande D. Radiography, myelography, computed tomography, and magnetic resonance imaging of the spine. Vet Clin North America: Small Anim Prac 1992; 22 (4): 811-831.
9. Stewart WA, Parent JML, Towner RA, et al. The use of magnetic resonance imaging in the diagnosis of neurological disease. Can Vet J 1992; 33: 585-589.
10. Taga A, Taura Y, Nishimoto T, et al. The advantage of magnetic resonance imaging in diagnosis of cauda equina syndrome in dogs. J Vet Med Sci 1998; 60: 1345-1348.
11. Cohen WA, Giauque AP, Hallam DK, et al. Evidence-based approach to use MR imaging in acute spinal trauma. Eur J Radiol 2003; 48: 49-60.
12. Frauchiger E, Fankhauser R. Nervous Dis Dogs. Bern: Verlag Hans Huber, 1949.
13. Olsson SE. On disc protrusion in dog (enchondrosis intervertebralis); a study with special reference to roentgen diagnosis and to the value of disc fenestration. Acta Orthop Scand Suppl 1951; 8: 1-95.
14. Hansen HJ. A pathologic-anatomical interpretation of disc degeneration in dogs. Acta Orthop Scand 1951; 20: 280-93.
15. Hansen HJ. Comparative views of the pathology of disk degeneration in animals. Lab Invest 1959; 8: 1242-65.
16. Hansen HJ. A pathologic-anatomical study on disk degeneration in the dog, with special reference to the so-called enchondrosis intervertebralis. Acta Orthop Scand Suppl 1952; 11: 1-117.
17. Ghosh P, Taylor TK, Braund KG, et al. A comparative chemical and histochemical study of the chondrodystrophoid and nonchondrodystrophoid canine intervertebral disc. Vet Pathol 1976; 13: 414-27.
18. Smolders LA, Bergknut N, Grinwis GC, et al. Intervertebral disc degeneration in the dog. Part 2: chondrodystrophic and non-chondrodystrophic breeds. Vet J 2013; 195: 292-9.
19. De Risio L, Adams V, Dennis R, et al. Magnetic resonance imaging findings and clinical associations in 52 dogs with suspected ischemic myelopathy J Vet Intern Med 2007; 21: 1290-1298.
20. Beltran E, Dennis R, Doyle V, et al. Clinical and magnetic resonance imaging features of canine compressive cervical myelopathy with suspected hydrated nucleus pulposus extrusion. J Small Anim Pract 2012; 53: 101.
21. Bagley R. Spinal cord enigmas: fibrocartilaginous emboli, arachnoid cyst and others. In: Proceedings of the 21st Annual American College of Veterinary Internal Medicine Forum. Charlotte, NC. 10-1. 2003.
22. Chang Y, Dennis R, Platt SR, et al. Magnetic resonance imaging of traumatic intervertebral disc extrusion in dogs. Vet Rec 2007; 160: 795-9.
23. Henke D, Gorgas D, Flegel T, et al. Magnetic resonance imaging findings in dogs with traumatic intervertebral disk extrusion with or without spinal cord compression: 31 cases (2006- 2010). J Am Vet Med Assoc 2013; 242: 217-22.
24. Bergknut N, Meij BP, Hagman R, et al. Intervertebral disc disease in dogs - part 1: a new histological grading scheme for classification of intervertebral disc degeneration in dogs. Vet J 2013; 195: 156-63.
25. Hansen T, Smolders LA, Tryfonidou MA. The myth of fibroid degeneration in the canine intervertebral disc: a histopathological comparison of intervertebral disc degeneration in chondrodystrophic and nonchondrodystrophic dogs. Vet Pathol 2017; 54: 945-52.
26. Kim D, Kang J, Kim Y, et al. Retrospective study of intervertebral disk disease confirmed by MRI in dogs: 89 Cases (2012-2015). J Vet Clin 2019; 36 (3): 139-144.
27. Wheeler SJ. Manual Small Anim Neurol. England. British Small Anim Vet Assoc, 2000.
28. Nelson RW, Couto CG. Small Anim Internal Med. 3rd Ed. USA. Mosby Inc, 2003.
29. Oliver JE, Lorenz MD. Handbook Vet Neurol. Philadelphia, USA. WB. Saunders Comp, 1993.
30. Schubert T. Physical a neurologic examinations. Small Anim Clin Sci, College of Vet Med, Univ Florida, 2013.
31. Schaer M. Clinical medicine of the dog and cat. Manson Pub Ltd. London, 2003.
32. Fenn J, Olby NJ. Injury Consortium (CANSORT-SCI). Classification of intervertebral disc disease, and the canine spinal cord. Front Vet Sci 2020; 7: 1-17.
33. Priester WA. Canine intervertebral disc disease - occurrence by age, breed, and sex among 8,117 cases. Theriogenology 1976; 6: 293-303.
34. Adams MA, Roughley PJ. What is intervertebral disc degeneration, and what causes it?. Spine 2006; 31: 2151-2161.
35. Brisson BA, Moffatt SL, Swayne SL, et al. Recurrence of thoracolumbar intervertebral disk extrusion in chondrodystrophic dogs after surgical decompression with or without prophylactic fenestration: 265 cases (1995–1999). J Am Vet Med Assoc 2004; 224: 1808-1814
36. Huska J. Comparison of hemilaminectomy and minihemilaminectomy in dogs with thoracolumbar intervertebral disc extrusion using computed tomography and magnetic resonance imaging: An Anatomical and Radiological Study, 2013.
37. Mayhew PD, McLear RC, Ziemer LS, et al. Risk factors for recurrence of clinical signs associated with thoracolumbar intervertebral disk herniation in dogs: 229 cases (1994- 2000). J Am Vet Med Assoc 2004; 225: 1231-1236.
38. Verheijen J, Bouw J. Canine intervertebral disc disease: a review of etiologic and predisposing factors. Vet Q 1982; 4: 125-134.
39. Bagley RS, Tucker RL, Moore MP, et al. Radiographic diagnosis: intervertebral disc extrusion in a cat. Vet Radiol Ultrasound 1995; 36: 380-382.
40. Kathmann I, Cizinauskas S, Rytz U, et al. Spontaneous lumbar intervertebral disc protrusion in cats: literature review and case presentations. J Feline Med Surgery 2000; 07-212.
41. Sanders S, Bagley RS, Tucker RL, et al. Radiographic diagnosis: focal spinal cord malacia in a cat. Vet Radiol Ultrasound 1999; 40: 122-125.
42. Schrader SC. Neurosurgery. In: The Cat, Diseases and Management, volume 2, Sherding RG Ed. New York. Churchill Livingstone, 1225-1245, 1989.
43. Chang Y, Dennis R, Platt SR, et al. Magnetic resonance imaging of traumatic intervertebral disc extension in dogs. Vet Record 2007; 160: 795-799.
44. Tobias KM, Johnston SA. Veterinary Surgery: Small Animal. E-BOOK: 2-Volume Set. Elsevier Health Sciences, 2013
45. Olby N. Current concepts in the management of acute spinal cord injury. J Vet Intern Med 1999; 13: 399-407.