Ganglion cyst arising from the composite occipito-atlanto-axial joint cavity in a cat

T. Aikawa; S. Sadahiro; M. Nishimura; Y. Miyazaki; M. Shibata

doi:10.3415/VCOT-13-10-0119

Veterinary and Comparative Orthopaedics and Traumatology, Table of Contents

Vet Comp Orthop Traumatol 2014; 27(04): 319-323
DOI: 10.3415/VCOT-13-10-0119

Case Report

Schattauer GmbH

Ganglion cyst arising from the composite occipito-atlanto-axial joint cavity in a cat

Authors

T. Aikawa

¹Aikawa Veterinary Medical Center, Tokyo, Japan

²Veterinary Surgical Service Japan, Tokyo, Japan
S. Sadahiro

¹Aikawa Veterinary Medical Center, Tokyo, Japan
M. Nishimura

¹Aikawa Veterinary Medical Center, Tokyo, Japan
Y. Miyazaki

¹Aikawa Veterinary Medical Center, Tokyo, Japan
M. Shibata

¹Aikawa Veterinary Medical Center, Tokyo, Japan

Abstract

Summary

A four-year-old, female spayed Domestic Longhaired cat was referred for evaluation with a two month history of initial inability to jump progressing to ambulatory tetraparesis. Magnetic resonance imaging studies demonstrated a cystic lesion arising from the composite occipito-atlanto-axial joint cavity and extending to the region of the occipital bone and the axis. The lesion surrounded the spinal canal, causing moderate dorsal spinal cord compression at the atlanto-occipital joint. A dynamic myelographic study demonstrated attenuation of the dorsal contrast column at the atlanto-occipital joint when the cervical spine was positioned in extension. Partial excision of the cyst capsule by a ventral approach resulted in long-term (64 months) resolution of clinical signs. Histological evaluation was consistent with a ganglion cyst. An intra-spinal ganglion cyst arising from the composite occipito-atlanto-axial joint cavity may be considered as an uncommon differential diagnosis for cats with cervical myelopathy.

Keywords

Ganglion cyst - synovial cyst - composite occipito-atlanto-axial joint - spine - cat

Full Text

References

References
1 Dickinson JP, Sturges BK, Berry WL. et al. Extradural spinal synovial cyst in nine dogs. J Small Anim Pract 2001; 42: 502-509.
2 Forterre F, Kaiser S, Garner M. et al. Synovial cysts associated with caudal equina syndrome in two dogs. Vet Surg 1994; 35: 30-33.
3 Levitski RE, Chauvet AE, Lipsitz D. Cervical myelopathy associated with extradural synovial cysts in 4 dogs. J Vet Intern Med 1999; 13: 181-186.
4 Perez B, Rollan E. Ramiro et al. Intraspinal synovial cyst in a dog. J Am Anim Hosp Assoc 2000; 36: 235-238.
5 Sale SHC, Smith KC. Extradural spinal juxtafacet (synovial) cysts in three dogs. J Small Anim Pract 2007; 48: 116-119.
6 Webb AA, Pharr JW, Tryon KA. MR imaging findings in a dog with lumbar ganglion cysts. Vet Radiol Ultrasound 2001; 42: 9-13.
7 Prymak C, Goldschmidt MH. Synovial cysts in five dogs and one cat. J Am Anim Hosp Assoc 1991; 27: 151-154.
8 Stead CA, Else RW, Stead MC. Synovial cysts in cats. J Small Anim Pract 1995; 36: 450-454.
9 Kao CC, Winkler SS, Turner JH. Synovial cyst of spinal facet: case report. J Neurosurg 1974; 41: 372-376.
10 Hsu KY, Zuchcerman JF, Shea WJ. et al. Lumber intraspinal synovial and ganglion cyst. Ten-year experience in evaluation and treatment. Spine 1995; 20: 80-89.
11 Jackson DE, Atlas SW, Mani JR. et al. Intraspinal synovial cysts: MR imaging. Radiology 1989; 170: 527-530.
12 Rosai J. Bone and joint. In: Rosai J. editor. Ackerman’s Surgical Pathology. St. Luis: Mosby; 1996. pg. 1996-1917.
13 Fritz RC, Kaiser JA, White AH. et al. Magnetic resonance imaging of a thoracic intraspinal synovial cyst. Spine 1994; 19: 487-490.
14 Holtzman RN, Dubin RR, Yang WC. et al. Bilateral symptomatic intraspinal T12-L1 synovial cyst. Surg Neurol 1987; 28: 225-230.
15 Pendleton B, Carl B, Pollay M. Spinal extradural benign synovial or ganglion cyst: case report and review of the literature. Neurosurgery 1983; 13: 322-326.
16 Schulz KS, Waldron DR, Fahie M. Application of ventral pins and polymethylmethacrylate for the management of atlantoaxial instability-results in nine dogs. Vet Surg 1997; 26: 317-325.
17 Akiyama H, Tamaki N, Kondoh T. et al. Craniocervical junction synovial cyst associated with atlanto-axial dislocation. Neurol Med Chir (Tokyo) 1999; 39: 539-543.
18 Forterre F, Vizcaino Reves N, Stahl C. et al. Atlantoaxial synovial cyst associated with instability in a Chihuahua. Case reports in veterinary medicine 2012. 2012 Article ID 898241; http://dx.doi.org/10.1155/2012/898241
19 Gutierrez-Quintana R, Hammond G, Wessmann A. Ventral occipito-atlanto-axial fluid-filled lesion causing dynamic spinal cord compression in a cat. J Feline Med Surg 2013; 16: 532-535.
20 Thomson CE, Kornegay JN, Burn RA. et al. Magnetic resonance imaging- a general overview of principles and examples in veterinary neurodiagnosis. Vet Radiol Ultrasound 1993; 34: 2-17.
21 Essig M, Bock M. Contrast optimization of fluid-attenuated inversion recovery (FLAIR) MR imaging in patients with high CSF blood or protein content. Magn Reson Med 2000; 43: 764-767.
22 Melhem ER, Jara H, Eustace S. Fluid-attenuated inversion recovery MR imaging: Identification of protein concentration thresholds for CSF hyperintensity. AJR Am J Roentgenol 1997; 169: 859-862.
23 Aikawa T, Shibata M, Fujita H. Modified ventral stabilization using positively threaded profile pins and polymethylmethacrylate for atlantoaxial instability in 49 dogs. Vet Surg 2013; 42: 683-692.
24 Middleton G, Hillmann J, Trichel J. et al. Magnetic resonance imaging of the ligamentous structures of the occipitoatlantoaxial region in the dog. Vet Radiol Ultrasound 2012; 53: 545-551.
25 Reighard J, Jennings HS. Anatomy of the cat. New York: Holt; 1966. pg. 486.