Intervertebral Disc Disease
Intervertebral Disc Disease (IVDD) occurs when the cushioning discs between vertebrae degenerate, bulge, or rupture into the spinal canal. This causes compression of the spinal cord or nerve roots, resulting in pain, nerve damage, and potentially paralysis. Type I (acute extrusion) is common in chondrodystrophic breeds; Type II (chronic protrusion) affects larger breeds.
Symptoms & Signs
- Back or neck pain
- Reluctance to move or jump
- Hunched posture
- Crying when picked up
- Wobbling or incoordination
- Dragging of limbs
- Loss of bladder/bowel control
- Paralysis (severe cases)
Causes & Risk Factors
Type I: premature degeneration and calcification of the nucleus pulposus in chondrodystrophic breeds (Dachshund, Beagle, French Bulldog), leading to acute disc extrusion. Type II: chronic fibrous degeneration causing gradual disc protrusion, typically in larger breeds.
Diagnosis
Neurological examination localizes the lesion. Radiographs may show calcified disc material or narrowed disc spaces. MRI is the gold standard for visualizing disc herniation and spinal cord compression. CT myelography is an alternative.
Treatment
Conservative: strict cage rest (4-6 weeks), anti-inflammatory medications, pain management, physical rehabilitation. Surgical: hemilaminectomy or ventral slot to decompress the spinal cord. Surgery recommended for severe cases (Grade 3-5) or those failing conservative management.
Prevention
Weight management to reduce spinal loading. Avoiding high-impact activities (jumping off furniture) in predisposed breeds. Using ramps and harnesses. Genetic research into disc degeneration markers.
Prognosis
Grade 1-3 (pain to non-ambulatory with deep pain): >90% recovery with appropriate treatment. Grade 4 (non-ambulatory, no deep pain <24hrs): 50-60% recovery with surgery. Grade 5 (no deep pain >48hrs): <5% recovery.
Affected Breeds (3)
| Breed | Species | Size |
|---|---|---|
| Beagle | Dog | Medium |
| Dachshund | Dog | Medium |
| Pembroke Welsh Corgi | Dog | Medium |