Spontaneous regression of extradural intraspinal cysts in a dog: a case report

Bonelli, Marília de Albuquerque; Costa, Ronaldo C. da

doi:10.1186/s12917-019-2152-x

Cited by 3 publications

(6 citation statements)

References 21 publications

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“…A recent case report showed decreases in synovial cyst size over 3.5 years in the lumbosacral spine of a dog 42 . Proposed mechanisms for decreased cyst size included restoration of stability, spontaneous rupture, and use of anti‐inflammatory drugs 42 . In the human medical literature 3 reports document resolution of synovial cysts 43‐45 …”

Section: Discussionmentioning

confidence: 99%

“…It is unknown why the cysts resolved, but CSM is a dynamic process, and it is possible that cysts improve and worsen with different positioning of the vertebral canal 41 . A recent case report showed decreases in synovial cyst size over 3.5 years in the lumbosacral spine of a dog 42 . Proposed mechanisms for decreased cyst size included restoration of stability, spontaneous rupture, and use of anti‐inflammatory drugs 42 .…”

Section: Discussionmentioning

confidence: 99%

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Long‐term clinical and magnetic resonance imaging follow‐up of dogs with osseous‐associated cervical spondylomyelopathy

Nye

Hostnik

Parker

et al. 2020

Veterinary Internal Medicne

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Background: Osseous-associated cervical spondylomyelopathy (OA-CSM) is a complex disorder with limited long-term survival. The longitudinal progression is currently unknown. Objective: To describe changes on magnetic resonance imaging (MRI) over a 2-year minimum period. We hypothesized that spinal lesions would progress in the majority of dogs. Animals: Eleven dogs previously diagnosed with OA-CSM were prospectively studied. Nine dogs were treated medically, whereas 2 were treated surgically. Methods: Clinical and MRI follow-up were performed with a median time between MRI studies of 30 months (range, 24-54). Morphologic assessment evaluated vertebral canal stenosis, spinal cord compression, foraminal stenosis, and articular processes, among other variables. Morphometric assessment included vertebral canal area, spinal cord area, area of the articular processes, and foraminal height. Results: On follow-up MRI, the most affected site at the initial examination in medically treated dogs had progressed in 4 of 9 dogs, improved in 4, and was unchanged in 3. Clinically, all dogs except 2 medically treated dogs were unchanged to improve at follow-up. Initially, 50 of 60 (83.3%) intervertebral spaces had vertebral canal stenosis, whereas in the follow-up MRI 82.3% did. Of the sites with stenosis, 45.7% were unchanged, 18.6% improved, and 38.9% worsened. Morphometry identified significant decreases in vertebral canal and spinal cord areas at C4-C5 through C6-C7, and significant progression of articular process irregularities at C3-C4 and C6-C7. Conclusions and Clinical Importance: This long-term follow-up study of dogs with OA-CSM did not identify clinical or MRI progression of lesions in the majority of dogs.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Long‐term clinical and magnetic resonance imaging follow‐up of dogs with osseous‐associated cervical spondylomyelopathy

Nye

Hostnik

Parker

et al. 2020

Veterinary Internal Medicne

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“…Extradural intraspinal cysts cause focal compression of the spinal cord resulting in neurological deficits, and surgical resection is the preferred treatment. [2][3][4][5][6] Spontaneous regression of extradural intraspinal cysts has been reported in both human and veterinary literature. 12,3 In our case, conservative management was unsuccessful in resolving the patient's clinical signs, and the aim of the surgery was to remove the cyst in order to achieve spinal decompression and to submit a tissue sample for histopathological analysis.…”

Section: Discussionmentioning

confidence: 99%

“…Extradural spinal cysts are rarely reported in dogs and cats. [1][2][3] There have been reports of canine spinal synovial cysts in the cervical spine of large breed dogs, as well as in the thoracolumbar and lumbosacral junctions. 1,[4][5][6][7] To the authors' knowledge, surgical excision of an extradural intraspinal cyst at the level of the foramen magnum has not been described in dogs.…”

Section: Introductionmentioning

confidence: 99%

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Surgical excision of an extradural intraspinal synovial cyst at the foramen magnum in a dog

Coppola,

Tabanez,

Saunders

et al. 2023

Vet Record Case Reports

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A 6‐year‐old, female, neutered labrador retriever was presented for investigation of cervical pain. At initial presentation, pain was localised to the cervical region. No neurological deficits were observed. Computed tomography scan and magnetic resonance imaging revealed an extra‐axial cyst‐like lesion at the level of the foramen magnum, with extension into the caudal fossa. Conservative management, which included activity restriction and a 4‐week course of corticosteroids failed to resolve the clinical signs, and the cyst was eventually surgically excised. Histological examination of the sample submitted confirmed a synovial cyst. The dog recovered uneventfully after surgery and remained pain free until the last follow‐up (9 months). Thus, surgical excision of an extradural intraspinal synovial cyst in a dog provided resolution of the clinical signs.

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Association of neurologic signs with high‐field MRI findings in 100 dogs with osseous‐associated cervical spondylomyelopathy

Bonelli

Costa

2021

Vet Radiology Ultrasound

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Although osseous-associated cervical spondylomyelopathy (OA-CSM) findings have been well described using magnetic resonance imaging (MRI), there are no large-scale published studies on the associations between dog size, age, high-field MRI and neurologic findings. Using a retrospective, observational study design, we aimed to investigate an association between neurologic and high-field MRI characteristics in OA-CSM.Records were reviewed for dogs diagnosed with OA-CSM using high-field MRI. Onehundred dogs were included: 73/100 (73%) were giant breeds, 27/100 (27%) large breeds. Mean and median ages were, respectively, 3.1 and 2 years (0.3-9.75 years), with 2.6 and 2 years for giant-breed; and 4.4 and 4 years for large-breed dogs. The majority of dogs were male (75%) with chronic presentation (89%), more than one site of spinal cord compression (78%) and foraminal stenosis (91%). Dogs with multiples sites of spinal cord compression were more likely to have severe spinal cord compression (p < 0.001), severe foraminal stenosis (p < 0.001) and ligamentum flavum/soft tissue proliferation (p = 0.03) than those with a single compressive site. There was a weak correlation between neurologic grade and severity of spinal cord compression (r = 0.27; p = 0.007), number of affected sites (r = 0.24; p = 0.0183) and spinal cord T2W hyperintensity (r = 0.24; p = 0.0152). Intervertebral disc degeneration was seen in 80% of dogs. Age did not appear to have a prominent role in the manifestation of OA-CSM.This study showed that OA-CSM affects a sizeable proportion of young large-breed, in addition to giant-breed dogs.

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Spontaneous regression of extradural intraspinal cysts in a dog: a case report

Cited by 3 publications

References 21 publications

Long‐term clinical and magnetic resonance imaging follow‐up of dogs with osseous‐associated cervical spondylomyelopathy

Long‐term clinical and magnetic resonance imaging follow‐up of dogs with osseous‐associated cervical spondylomyelopathy

Surgical excision of an extradural intraspinal synovial cyst at the foramen magnum in a dog

Association of neurologic signs with high‐field MRI findings in 100 dogs with osseous‐associated cervical spondylomyelopathy

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