Cervical Vertebral Stenosis Associated with a Vertebral Arch Anomaly in the Basset Hound
Article first published online: 14 SEP 2012
Copyright © 2012 by the American College of Veterinary Internal Medicine
Journal of Veterinary Internal Medicine
Volume 26, Issue 6, pages 1374–1382, November/December 2012
How to Cite
De Decker, S., De Risio, L., Lowrie, M., Mauler, D., Beltran, E., Giedja, A., Kenny, P.J., Gielen, I., Garosi, L. and Volk, H. (2012), Cervical Vertebral Stenosis Associated with a Vertebral Arch Anomaly in the Basset Hound. Journal of Veterinary Internal Medicine, 26: 1374–1382. doi: 10.1111/j.1939-1676.2012.00990.x
- Issue published online: 20 NOV 2012
- Article first published online: 14 SEP 2012
- Manuscript Accepted: 11 JUL 2012
- Manuscript Revised: 17 JUN 2012
- Manuscript Received: 8 MAY 2012
- Bone morphogenetic proteins;
- Congenital vertebral malformation;
- Dorsal cervical laminectomy;
- Spinous process
To report the clinical presentation, imaging characteristics, treatment results, and histopathological findings of a previously undescribed vertebral malformation in the Basset Hound.
Animals and Methods
Retrospective case series study. Eighteen Basset Hounds presented for evaluation of a suspected cervical spinal cord problem. All dogs underwent computed tomography myelography or magnetic resonance imaging of the cervical region.
Thirteen male and 5 female Basset Hounds between 6 months and 10.8 years of age (median: 1.4 years) were studied. Clinical signs varied from cervical hyperesthesia to nonambulatory tetraparesis. Imaging demonstrated a well-defined and smooth hypertrophy of the dorsal lamina and spinous process of ≥2 adjacent vertebrae. Although this bony abnormality could decrease the ventrodorsal vertebral canal diameter, dorsal midline spinal cord compression was predominantly caused by ligamentum flavum hypertrophy. The articulation between C4 and C5 was most commonly affected. Three dogs were lost to follow-up, 10 dogs underwent dorsal laminectomy, and medical management was initiated in 5 dogs. Surgery resulted in a good outcome with short hospitalization times (median: 4.5 days) in all dogs, whereas medical management produced more variable results. Histopathology confirmed ligamentum flavum hypertrophy and demonstrated the fibrocartilaginous nature of this anomaly.
Conclusions and Clinical Importance
Dorsal lamina and spinous process hypertrophy leading to ligamentum flavum hypertrophy should be included in the differential diagnosis of Basset Hounds with cervical hyperesthesia or myelopathy. Prognosis after decompressive surgery is favorable. Although a genetic component is suspected, additional studies are needed to determine the specific etiology of this disorder.