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Canine acute cervical myelopathy: Hydrated nucleus pulposus extrusion or intraspinal discal cysts?
Vet Surg. 2017 Apr; 46(3):376-380.VS

Abstract

OBJECTIVE

To differentiate between hydrated nucleus pulposus extrusion and ventral intraspinal discal cysts in dogs.

STUDY DESIGN

Prospective case series.

ANIMALS

Twenty dogs with acute onset of cervical myelopathy due to hydrated nucleus pulposus extrusion or ventral intraspinal discal cysts.

METHODS

Clinical and magnetic resonance (MR) imaging findings, outcome after surgical treatment, cytologic and histologic findings of compressive material were taken into account. Comparisons and considerations were done between findings reported herein and what was previously described as suspected hydrated nucleus pulposus extrusion and intraspinal cysts.

RESULTS

All dogs were presented with acute onset of cervical myelopathy. MR imaging showed compressive cervical myelopathy at C2-C3 (n = 1), C3-C4 (n = 6), C4-C5 (n = 8), and C5-C6 (n = 5) intervertebral disc spaces, due to extradural material suggestive of either partially hydrated nucleus pulposus extrusion or intraspinal discal cyst, with T2 hyperintense and T1 iso-hypointense signal and variable contrast enhancement after gadolinium injection. All dogs were treated surgically by ventral slot (n = 15) or dorsolateral hemilaminectomy (n = 5). All dogs had a favorable outcome and regained a normal gait. The extradural material collected at surgery varied from liquid to more obvious gelatinous material. Cytologic or histologic examination of the material revealed similar findings for all dogs, compatible with partially degenerated nucleus pulposus.

CONCLUSIONS

Dogs with acute onset of compressive cervical myelopathy due to extradural material resembling human intraspinal cysts on MR images are most likely to have extrusion of partially degenerated nucleus pulposus and should be treated accordingly.

Authors+Show Affiliations

Diagnostica Piccoli Animali, Zugliano, VI, Italy.

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

28151550

Citation

Falzone, Cristian. "Canine Acute Cervical Myelopathy: Hydrated Nucleus Pulposus Extrusion or Intraspinal Discal Cysts?" Veterinary Surgery : VS, vol. 46, no. 3, 2017, pp. 376-380.
Falzone C. Canine acute cervical myelopathy: Hydrated nucleus pulposus extrusion or intraspinal discal cysts? Vet Surg. 2017;46(3):376-380.
Falzone, C. (2017). Canine acute cervical myelopathy: Hydrated nucleus pulposus extrusion or intraspinal discal cysts? Veterinary Surgery : VS, 46(3), 376-380. https://doi.org/10.1111/vsu.12631
Falzone C. Canine Acute Cervical Myelopathy: Hydrated Nucleus Pulposus Extrusion or Intraspinal Discal Cysts. Vet Surg. 2017;46(3):376-380. PubMed PMID: 28151550.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Canine acute cervical myelopathy: Hydrated nucleus pulposus extrusion or intraspinal discal cysts? A1 - Falzone,Cristian, Y1 - 2017/02/02/ PY - 2016/03/15/received PY - 2016/08/30/accepted PY - 2017/2/6/pubmed PY - 2017/6/27/medline PY - 2017/2/3/entrez SP - 376 EP - 380 JF - Veterinary surgery : VS JO - Vet Surg VL - 46 IS - 3 N2 - OBJECTIVE: To differentiate between hydrated nucleus pulposus extrusion and ventral intraspinal discal cysts in dogs. STUDY DESIGN: Prospective case series. ANIMALS: Twenty dogs with acute onset of cervical myelopathy due to hydrated nucleus pulposus extrusion or ventral intraspinal discal cysts. METHODS: Clinical and magnetic resonance (MR) imaging findings, outcome after surgical treatment, cytologic and histologic findings of compressive material were taken into account. Comparisons and considerations were done between findings reported herein and what was previously described as suspected hydrated nucleus pulposus extrusion and intraspinal cysts. RESULTS: All dogs were presented with acute onset of cervical myelopathy. MR imaging showed compressive cervical myelopathy at C2-C3 (n = 1), C3-C4 (n = 6), C4-C5 (n = 8), and C5-C6 (n = 5) intervertebral disc spaces, due to extradural material suggestive of either partially hydrated nucleus pulposus extrusion or intraspinal discal cyst, with T2 hyperintense and T1 iso-hypointense signal and variable contrast enhancement after gadolinium injection. All dogs were treated surgically by ventral slot (n = 15) or dorsolateral hemilaminectomy (n = 5). All dogs had a favorable outcome and regained a normal gait. The extradural material collected at surgery varied from liquid to more obvious gelatinous material. Cytologic or histologic examination of the material revealed similar findings for all dogs, compatible with partially degenerated nucleus pulposus. CONCLUSIONS: Dogs with acute onset of compressive cervical myelopathy due to extradural material resembling human intraspinal cysts on MR images are most likely to have extrusion of partially degenerated nucleus pulposus and should be treated accordingly. SN - 1532-950X UR - https://www.unboundmedicine.com/medline/citation/28151550/Canine_acute_cervical_myelopathy:_Hydrated_nucleus_pulposus_extrusion_or_intraspinal_discal_cysts L2 - https://doi.org/10.1111/vsu.12631 DB - PRIME DP - Unbound Medicine ER -