scholarly journals Classification of Intervertebral Disc Disease

2020 ◽  
Vol 7 ◽  
Author(s):  
Joe Fenn ◽  
Natasha J. Olby ◽  
Keyword(s):  
Intervertebral Disc ◽  
Intervertebral Disc Degeneration ◽  
Clinical Findings ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Clinical Presentations ◽  
Disc Material ◽  
Definition Of ◽  
Current Systems

Intervertebral disc disease (IVDD) has been recognized in dogs since the 1800s, when the first descriptions of extruded disc material within the vertebral canal were published. In the intervening time our understanding of intervertebral disc pathology in dogs and cats has increased dramatically, with many variations of IVDD described. Whilst the volume of literature and collective understanding of IVDD has expanded, there has also been scope for confusion as the definition of intervertebral disc disease, with its myriad different manifestations, becomes more complicated. A large volume of literature has aimed to combine the use of histopathology, diagnostic imaging and clinical findings to better understand the various ways in which IVDD can be classified. Much of this research has focused on the classification of mechanisms of intervertebral disc degeneration, centering around the differences between, and overlaps in, IVDD in chondrodystrophic and non-chondrodystrophic dog breeds. However, with the increasing availability of advanced imaging modalities allowing more accurate antemortem diagnosis, the concept of IVDD has expanded to include other clinical presentations that may not fit into traditional models of classification of IVDD. This review aims to provide an up to date overview of both historical and current systems of IVDD classification, highlighting the important findings and controversies underpinning them.

Residual herniated disc material following hemilaminectomy in chondrodystrophic dogs with thoracolumbar intervertebral disc disease

2012 ◽  
Vol 25 (02) ◽  
pp. 109-115 ◽  
Author(s):  
M. Thomas ◽  
J. M. Weh ◽  
J. Bleedorn ◽  
K. Wells ◽  
W. J. Roach
Keyword(s):  
Intervertebral Disc ◽  
Herniated Disc ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Vertebral Canal ◽  
Telephone Interviews ◽  
Disc Material ◽  
Long Term Follow Up

SummaryObjective: To evaluate the presence of residual disc material within the vertebral canal following hemilaminectomy in chondrodystrophic dogs with thoracolumbar intervertebral disc disease.Methods: Forty dogs were treated by hemilaminectomy. Computed tomography was performed preoperatively and immediately postoperatively. The vertebral canal height, width, area, and herniated disc material area were measured. Maximum filling percentage (MFP), residual disc percentage (RDP), maximum residual filling percentage (MRFP), and residual filling percentage (RFP) were calculated. Clinical outcome was determined by telephone interviews.Results: Residual disc material was present in 100% of the dogs. Mean MFP = 55.4% (range 25.9–82.3%; median 56.9%). Mean RDP = 50.3% (range 2.6–155.8%; median 47.9%). Mean MRFP = 30.8% (range 4.9–60%; median 30.1%). Mean RFP = 19.8% (range 4.8–45%; median 19.0%). All dogs were ambulatory with voluntary urination at the long-term follow-up (range: 88–735 days).Clinical significance: Residual disc was present in all dogs following hemilaminectomy for intervertebral disc disease. Residual disc was not associated with failure to achieve functional recovery in these cases.

Chymopapain treatment of intervertebral disc disease

1975 ◽  
Vol 42 (4) ◽  
pp. 374-383 ◽  
Author(s):  
Clark Watts ◽  
Robert Knighton ◽  
George Roulhac
Keyword(s):  
Intervertebral Disc ◽  
Proteolytic Enzyme ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Disc Space ◽  
Content Type ◽  
Disc Material ◽  
Capillary Endothelial Cells ◽  
Fine Print ◽  
Rapid Conversion

✓ In the first of a two-part study, the authors review the known biochemical, pharmacological, toxicological, and experimental data concerning chymopapain and the intervertebral disc. They describe the action of this proteolytic enzyme, which apparently disrupts the protein mucopolysaccharide component of disc material, most marked in the nucleus pulposus. A rapid conversion to collagen causes a loss of disc space height; toxicity appears to result from alteration of bonding between capillary endothelial cells that in turn produces hemorrhage. Part 2 reviews significant reported results and complications of clinical chemonucleolysis.

scholarly journals Intradural Disc Extrusion in a Dog

2020 ◽  
Vol 48 ◽  
Author(s):  
Angel Ripplinger ◽  
Graciane Aiello ◽  
Mathias Reginatto Wrzesinski ◽  
Marcelo Luís Schwab ◽  
Júlia Da Silva Rauber ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Conservative Treatment ◽  
Intervertebral Disc ◽  
Spinal Canal ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Disc Material ◽  
Spinal Cord Dysfunction ◽  
Intradural Space ◽  
Disc Extrusion

Background: Intervertebral disc extrusion is an important cause of spinal cord dysfunction in dogs. Intradural localization of the extruded disc material is rare, and is generally associated with a traumatic event or with recurrence of disc extrusion at a previously affected site. We report the clinical presentation, diagnostic workup, and treatment of a dog with intradural intervertebral disc extrusion not preceded by a traumatic event.Case:  A 6-year-old male Dachshund was referred for neurological evaluation due to acute onset of hind-end paralysis preceded by claudication of the left hindlimb. The patient had been receiving conservative treatment to no effect. Neurological examination revealed asymmetric non-ambulatory paraparesis, absence of postural reactions and decreased muscle tone in both hindlimbs, a bilaterally diminished patellar reflex, and a hindlimb withdrawal reflex which was normal on the right and greatly diminished to absent on the left. The lower back was tender to epaxial palpation. Plain radiographs of the lumbar spine in the lateral projection showed calcified material within the spinal canal between the third and fourth lumbar vertebrae. Myelography was suggestively abnormal at the same level, with epidural leakage of contrast at L3-L4. Considering the clinical history, breed, age, neurological signs, and radiographic findings, intervertebral disc disease was suspected despite the inconclusive myelography findings. A dorsolateral lumbar hemilaminectomy was performed. Intraoperatively, the diagnosis was confirmed by visualization of a discolored spinal cord and absence of extradural material. The intradural space was accessed via durotomy. A firm, straw-yellow material was seen compressing the spinal cord and removed. Subsequent histopathological examination confirmed that this material consisted of extruded intervertebral disc contents. Postoperatively, the patient underwent physiotherapy and achieved a satisfactory recovery.Discussion: The most common cause of paraparesis in chondrodystrophic dog breeds is intervertebral disc extrusion. Intradural extrusion of the intervertebral disc is a rare phenomenon, often associated with vigorous exercise that causes laceration of the dura mater, allowing penetration of disc material into the intradural space. Although there were no classic signs of intervertebral disc disease on plain radiography, radiopaque material was visible within the spinal canal, which can occur in cases of calcified intervertebral disc extrusion. Myelography was inconclusive, but the decision was made to operate nevertheless, considering that the patient had not responded to conservative treatment and that surgicaltreatment is the most suitable approach for dogs with non-ambulatory paraparesis or paraplegia secondary to intervertebral disc extrusion. The surgical technique consisted of a hemilaminectomy and durotomy. Our diagnostic suspicion was confirmed intraoperatively, as in most cases of intradural disc extrusion in humans. Intradural disc extrusion is anuncommon phenomenon in dogs, and the diagnosis is usually only established intraoperatively. This unusual variant of intravertebral disc disease should be included in the differential diagnosis of spinal cord dysfunction in chondrodystrophic breeds, even in the absence of a history of trauma or preexisting intervertebral disc disease. Clinical treatment appears ineffective in these cases. Conversely, surgical treatment can yield good outcomes, and even functional recovery.

scholarly journals Clinical management of dogs with presumptive diagnosis of thoracolumbar intervertebral disc disease: 164 cases (2006-2017)

2020 ◽  
Vol 40 (1) ◽  
pp. 55-60 ◽  
Author(s):  
Raquel Baumhardt ◽  
Angel Ripplinger ◽  
Graciane Aiello ◽  
Marcelo L. Schwab ◽  
Denis A. Ferrarin ◽  
...  
Keyword(s):  
Intervertebral Disc ◽  
Clinical Management ◽  
Clinical Signs ◽  
Neurological Dysfunction ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Presumptive Diagnosis ◽  
Grade Ii ◽  
Veterinary Hospital

ABSTRACT: This study aimed to identify dogs with presumptive diagnosis of cervical intervertebral disc disease (IVDD) submitted to clinical management and to evaluate the outcomes. Data were obtained from the medical records of patients with neurological dysfunction assisted at a University Veterinary Hospital from 2006 to 2017. In addition to the patients’ records, dog owners responded to a questionnaire on the success of therapy. Four hundred and thirteen neurological records were evaluated, and 164 met the inclusion criteria of the study. The most common breed was Dachshund, followed by mongrels. Classification of neurological dysfunction in the study sample was as follows: 15.9% with grade I, 25.6% with grade II, 26.8% with grade III, 8.5% with grade IV, and 23.2% with grade V. Outcome was satisfactory in 71.6% of the dogs and unsatisfactory in 28.4% of them. Recurrence was observed in 27.7% of those with satisfactory outcomes. The clinical treatment of dogs with thoracolumbar IVDD is satisfactory, particularly for animals with milder disease grades (I, II, and III). There is possibility of recurrence with conservative therapy and clinical signs may be more severe.

Outcome of thoracolumbar surgical feline intervertebral disc disease

2021 ◽  
pp. 1098612X2110280
Author(s):  
Kayla M Fowler ◽  
Theresa E Pancotto ◽  
Stephen R Werre ◽  
Michaela J Beasley ◽  
William Kay ◽  
...  
Keyword(s):  
Clinical Outcome ◽  
Intervertebral Disc ◽  
Positive Outcome ◽  
Intervertebral Disc Herniation ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Exact Test ◽  
Imaging Results ◽  
Larger Sample

Objectives The aim of this study was to evaluate the outcome and prognosis of thoracolumbar feline intervertebral disc disease (IVDD) treated by surgical decompression. Methods This was a multi-institutional retrospective study evaluating the age, breed, sex, body weight, presenting complaint, neuroanatomic diagnosis at presentation, diagnostic imaging results, surgery performed and the overall outcome at discharge and at recheck. Bivariable associations between variables were assessed using the Kruskal–Wallis test (age and grade of IVDD at presentation) and Fisher’s exact test (grade of IVDD at presentation and outcome). Results A total of 35 cats met the inclusion criteria for the study. The most frequently reported clinical sign was difficulty walking (54.2%). The majority of cats presented with an L4–S3 localization (57%). The most common site of intervertebral disc herniation (IVDH) was at L6–L7 (34%). The majority of feline patients that received surgery had a positive outcome at the time of discharge (62.5%; n = 20/32) and at the time of the 2-week recheck (91.3%; n = 21/23). No association was identified between the age of the patient and the grade of IVDD. No association was identified between the presenting grade of IVDD and the clinical outcome at the time of discharge or at the time of recheck evaluation. Conclusions and relevance Cats undergoing spinal decompressive surgery for thoracolumbar IVDH appear to have a favorable prognosis independent of the initial presenting grade of IVDD. A larger sample size and a longer length of follow-up is necessary to obtain statistical associations between the presenting grade of IVDD and overall clinical outcome.

Treatment of protruded lumbar intervertebral discs with chymopapain (Discase)

1973 ◽  
Vol 39 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Dwight Parkinson ◽  
Christopher Shields
Keyword(s):  
Intervertebral Disc ◽  
Drug Administration ◽  
Food And Drug Administration ◽  
Intervertebral Discs ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Chemical Action ◽  
Content Type ◽  
Fine Print

✓ Thirty-three intervertebral disc patients who otherwise would have been subjected to surgery were treated by injection with chymopapain. The pharmacology, toxicology, physiology, immunology, and chemical action of this enzyme, which specifically reacts with chondromucoproteins, are discussed. Results indicate that this method, although still experimental and unapproved by the U. S. Food and Drug Administration, may become a useful addition to the surgeon's armamentarium in the treatment of intervertebral disc disease.

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