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Guo S. Surgical treatment and outcome of haematomyelia with a traumatic cause in a dog and a cat. Vet Med Sci 2024; 10:e1377. [PMID: 38358058 PMCID: PMC10867873 DOI: 10.1002/vms3.1377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 01/09/2024] [Accepted: 01/29/2024] [Indexed: 02/16/2024] Open
Abstract
Two surgically treated haematomyelia cases were documented. One dog and one cat were presented for acute progressive paraplegia following a fall from height incident. Neurological examinations suggested a L4-S3 myelopathy in both cases. Radiography and magnetic resonance imaging in both cases revealed no fracture or subluxation of the spine, but well-defined intramedullary mass lesions in lower lumbar regions compatible with haemorrhage and haematoma formation. Exploratory surgeries were performed over the lesions. Dark-red friable masses were removed via myelotomy. Histopathological examinations revealed organizing haematomas at the acute to subacute stage. Postoperatively, both cases improved and regained ambulation. The dog walked normally but remained urinary and faecal incontinent 9 months after the surgery. The cat was continent and ambulatory with a paraparetic gait 5 months after the surgery. In both cases, the outcomes and the patients' quality of life were considered satisfactory by the owners.
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2
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Amey JA, Liatis T, Cherubini GB, De Decker S, Foreman MH. Outcomes of surgically and conservatively managed thoracolumbar and lumbosacral intervertebral disc herniations in cats. J Vet Intern Med 2024; 38:247-257. [PMID: 38148600 PMCID: PMC10800212 DOI: 10.1111/jvim.16950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 11/10/2023] [Indexed: 12/28/2023] Open
Abstract
BACKGROUND Limited information is available regarding intervertebral disc herniation (IVDH) and its treatment in cats. OBJECTIVES Describe outcomes after surgical or conservative treatment of cats with thoracolumbar and lumbosacral IVDH. ANIMALS Ninety-two cats from 2 referral populations (2012-2022) with compressive IVDH between the T3 and S1 vertebrae. METHODS Retrospective cohort study evaluating outcomes of surgical (49 cats) and conservative (36 cats) management of IVDH; 7 cats were euthanized at diagnosis. Outcome was assessed using hospital and referring veterinarian records and client questionnaires. Successful outcome was defined as regained or improved ambulation, urinary and fecal continence, and no requirement for analgesic medication. RESULTS Incidence of IVDH during the study period was 0.44% (92/20849). Surgical treatment resulted in 62% (6 weeks) and 74% success (6 months). Conservative treatment resulted in 54% (6 weeks) and 65% success (6 months). Neurological grade at presentation was higher in cats treated surgically (median, 2; range, 1-5) than in those treated conservatively (median, 2; range, 0-4; P = .001). Regardless of treatment type, cats suffering trauma were more likely to have a successful outcome 6 weeks after treatment compared with those without history of trauma (odds ratio, 5.3; 95% confidence interval, 1.05-26.78; P = .04). Neurological deficits remained in the majority of cats for both treatment types (92%, conservative; 86%, surgical at 6 weeks). Acute-on-chronic IVDH with characteristics of both extrusion and protrusion were identified in 10% of cats. CONCLUSIONS AND CLINICAL IMPORTANCE Conservative treatment could be as effective as surgical decompression in cats with thoracolumbar or lumbosacral IVDH.
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Affiliation(s)
- Jack A. Amey
- Dick White ReferralsPart of Linnaeus Veterinary LimitedSix Mile BottomUK
| | | | - Giunio Bruto Cherubini
- Veterinary Teaching Hospital “Mario Modenato,” Department of Veterinary SciencesUniversity of PisaPisaItaly
| | | | - Max H. Foreman
- Dick White ReferralsPart of Linnaeus Veterinary LimitedSix Mile BottomUK
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Itoi T, Kutara K, Mitsui I, Akashi N, Kanda T, Sugimoto K, Shimizu Y, Yamazoe K. Magnetic resonance imaging findings of the primitive neuroectodermal tumour in lumbosacral spinal cord in a cat. Vet Med Sci 2023; 9:2399-2403. [PMID: 37742085 PMCID: PMC10650244 DOI: 10.1002/vms3.1283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 09/06/2023] [Accepted: 09/11/2023] [Indexed: 09/25/2023] Open
Abstract
A 5-year-old, castrated, male domestic short-haired cat presented with neurological deficits in the pelvic limbs, back pain and dysuria. Magnetic resonance imaging showed a mass lesion caudal to the L4 vertebrae. In addition, suspected haemorrhage was observed at the cranial aspect of the mass. There was no evidence to support the presence of extravertebral intrusion or vertebral body, osteolysis. Dorsal laminectomy and durotomy were performed to debulk the intraspinal mass. Histopathological and immunohistochemical assessment revealed a primitive neuroectodermal tumour (PNET). To our knowledge, this is the first report to describe the clinical and pathological features and imaging diagnosis of intraspinal PNET without extraspinal invasion in a cat.
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Affiliation(s)
- Takamasa Itoi
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Kenji Kutara
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Ikki Mitsui
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Natsuki Akashi
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Teppei Kanda
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Keisuke Sugimoto
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Yuki Shimizu
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
| | - Kazuaki Yamazoe
- Faculty of Veterinary MedicineOkayama University of ScienceImabariEhimeJapan
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Santifort KM, Carrera I, Platt S. Case report: Traumatic hemorrhagic cervical myelopathy in a dog. Front Vet Sci 2023; 10:1260719. [PMID: 37869493 PMCID: PMC10585029 DOI: 10.3389/fvets.2023.1260719] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/21/2023] [Indexed: 10/24/2023] Open
Abstract
A 1.5-year-old female entire French bulldog was referred for neurological evaluation, further diagnostic tests, and treatment 24 h after a road traffic accident. Initial emergency treatment, diagnostic tests, and stabilization had been performed by the referring veterinarian. Neurological examination revealed severe spastic non-ambulatory tetraparesis and was consistent with a C1-5 myelopathy. A magnetic resonance imaging (MRI) study revealed an irregular to elongated ovoid intramedullary lesion centered over the body of C2. The lesion showed marked signal heterogeneity with a central T2W and T2* hyperintense region, surrounded by a hypointense rim on both sequences. The lesion appeared heterogeneously T1W hypointense. The lesion was asymmetric (right-sided), affecting both white and gray matter. The C2-3 intervertebral disk appeared moderately degenerate with a Pfirrmann grade of 3. No evidence of vertebral fracture or luxation was found on radiographs or MRI of the vertebral column. Additional soft tissue abnormalities in the area of the right brachial plexus were suggestive of brachial plexus and muscle injury. A diagnosis of traumatic hemorrhagic myelopathy at the level of C2 and concurrent brachial plexus injury was formed. Conservative treatment was elected and consisted of physiotherapy, bladder care with an indwelling urinary catheter, repeated IV methadone based on pain scoring (0.2 mg/kg), oral meloxicam 0.1 mg/kg q24h, and oral gabapentin 10 mg/kg q8h. The dog was discharged after 4 days, with an indwelling urinary catheter and oral medication as described. The catheter was replaced two times by the referring veterinarian and finally removed after 10 days. Thereafter, voluntary urination was seen. During the 2 months after the road traffic accident, slow recovery of motor function was seen. The right thoracic limb recovery progressed more slowly than the left limb, also showing some lower motor neuron signs during follow-up. This was judged to be consistent with a right-sided brachial plexus injury. The dog was reported ambulatory with mild residual ataxia and residual monoparesis of the right thoracic limb at the last follow-up 3 months post-injury. This case report highlights the MRI-based diagnosis of traumatic hemorrhagic myelopathy in a dog. A fair short-term outcome was achieved with conservative treatment in this case.
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Affiliation(s)
- Koen M. Santifort
- IVC Evidensia Small Animal Referral Hospital Arnhem, Neurology, Arnhem, Netherlands
- IVC Evidensia Small Animal Referral Hospital Hart van Brabant, Neurology, Waalwijk, Netherlands
| | - Ines Carrera
- Vet Oracle Teleradiology, Norfolk, United Kingdom
| | - Simon Platt
- Vet Oracle Teleradiology, Norfolk, United Kingdom
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Clark R, Ferreira A, Behr S. Significance of intramedullary T2 * signal voids in the magnetic resonance imaging of paraplegic deep pain-negative dogs following intervertebral disc extrusion at short-term follow-up. Front Vet Sci 2023; 10:1248024. [PMID: 37781293 PMCID: PMC10533920 DOI: 10.3389/fvets.2023.1248024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/10/2023] [Indexed: 10/03/2023] Open
Abstract
Introduction Dogs presenting as paraplegic without nociception due to a thoracolumbar intervertebral disc extrusion provide a difficult decision to both the clinician and the owner. The prognosis when performing surgical decompression remains guarded. Aside from significant extradural compression, these dogs often have a significant secondary spinal cord injury, which has shown to be an important factor in determining both the likelihood of developing progressive myelomalacia and the return to ambulation. Materials and methods This is a retrospective, observational, single centre study including 82 dogs presenting as paraplegic with absent nociception diagnosed with an intervertebral disc extrusion. Patients underwent MRI of the thoracolumbar spine, including a gradient echo sequence which was evaluated for the presence of intramedullary signal void artefacts. Decompressive surgery was performed, and patients were evaluated for the presence of nociception at short term follow up (at least four weeks post-surgery). Results Overall, 59.8% of patients regained nociception within the study period. This number was significantly reduced to 33.3% when multiple gradient echo signal voids were present (compared to 67.3% of dogs without signal voids). There was no significant difference in the rate of developing progressive myelomalacia between groups. Conclusions This paper adds to the existing literature and suggests that the gradient echo sequence may be of use when assessing acute spinal cord injury in the context of intervertebral disc extrusion and how it relates to prognosis.
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Affiliation(s)
- Robert Clark
- Neurology and Neurosurgery, Willows Veterinary Centre and Referral Service, Part of Linnaeus Veterinary Limited, Solihull, United Kingdom
| | - Amy Ferreira
- Diagnostic Imaging, Willows Veterinary Centre and Referral Service, Solihull, United Kingdom
| | - Sebastien Behr
- Neurology and Neurosurgery, Willows Veterinary Centre and Referral Service, Part of Linnaeus Veterinary Limited, Solihull, United Kingdom
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O'Byrne KL, Stent A, Tauro A. Clinicopathologic and imaging features of a primary poorly differentiated extradural haemangiosarcoma with polyostotic vertebral involvement and pulmonary metastases in a dog. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kadie Leanne O'Byrne
- Perth Veterinary Specialists Perth Western Australia Australia
- The University of Melbourne Melbourne Victoria Australia
| | - Andrew Stent
- The University of Melbourne Melbourne Victoria Australia
| | - Anna Tauro
- ChesterGates Veterinary Specialists Chester UK
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Fowler KM, Bolton TA, Rossmeisl JH, Arendse AU, Vernau KM, Li RHL, Parker RL. Clinical, Diagnostic, and Imaging Findings in Three Juvenile Dogs With Paraspinal Hyperesthesia or Myelopathy as a Consequence of Hemophilia A: A Case Report. Front Vet Sci 2022; 9:871029. [PMID: 35498741 PMCID: PMC9051508 DOI: 10.3389/fvets.2022.871029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/15/2022] [Indexed: 12/02/2022] Open
Abstract
Three juvenile dogs presented with an acute onset of paraspinal hyperesthesia and/or neurologic deficits. These dogs underwent anesthesia for MRI and additional diagnostics. The thoracolumbar MRI in Dog 1 revealed an accumulation of T2-weighted (T2W) hyperintense, T1-weighted (T1W) iso- to hyperintense, contrast enhancing extradural material. The differential diagnoses were meningitis with secondary hemorrhage or empyema or late subacute hemorrhage. The initial cervical MRI in Dog 2 revealed T1W meningeal contrast enhancement suspected to be secondary to meningitis. A repeat MRI following neurologic decline after CSF sampling revealed a large area of T2W and T1W hyperintensity between fascial planes of the cervical musculature as well as T2W iso- to hyperintense and T1W iso- to hypointense extradural material at the level of C1 consistent with hemorrhage. The cervical MRI in Dog 3 revealed T2W hyperintense and T1W iso- to hypointense extradural compressive material consistent with hemorrhage. Dogs 1 and 2 underwent CSF sampling and developed complications, including subcutaneous hematoma and vertebral canal hemorrhage. Dog 3 underwent surgical decompression, which revealed a compressive extradural hematoma. In each case, a hemophilia panel including factor VIII concentration confirmed the diagnosis of hemophilia A. Dog 1 had a resolution of clinical signs for ~5 months before being euthanized from gastrointestinal hemorrhage. Dog 2 was euthanized due to neurologic decompensation following CSF sampling. Dog 3 did well for 2 weeks after surgery but was then lost to follow-up. This case series provides information on clinical signs, MRI findings, and outcome in 3 juvenile dogs with hemophilia A that developed neurologic deficits or paraspinal hyperesthesia secondary to spontaneous or iatrogenic vertebral canal hemorrhage. Hemophilia A should be considered as a differential in any young dog presenting with an acute onset of hyperesthesia with or without neurologic deficits. This diagnosis should be prioritized in young male dogs that have other evidence of hemorrhage on physical exam.
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Affiliation(s)
- Kayla M. Fowler
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Timothy A. Bolton
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - John H. Rossmeisl
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
- Comprehensive Cancer Center and Brain Tumor Center of Excellence, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Avril U. Arendse
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
| | - Karen M. Vernau
- Department of Surgical and Radiological Sciences, University of California, Davis, Davis, CA, United States
| | - Ronald H. L. Li
- Department of Surgical and Radiological Sciences, University of California, Davis, Davis, CA, United States
| | - Rell L. Parker
- Department of Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States
- *Correspondence: Rell L. Parker
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8
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Mallol C, Gutierrez-Quintana R, Hammond G, Schweizer-Gorgas D, De Decker S, Novellas R, Espada Y, Oevermann A, Ortega M, Parry A, Coelho AM, Gonçalves R, Stalin C, Brocal J. MRI features of canine hemangiosarcoma affecting the central nervous system. Vet Radiol Ultrasound 2021; 63:185-196. [PMID: 34873768 DOI: 10.1111/vru.13041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 09/24/2021] [Accepted: 09/24/2021] [Indexed: 12/13/2022] Open
Abstract
Hemangiosarcoma is the most common metastatic tumor involving the brain in dogs but detailed published descriptions of the magnetic resonance imaging (MRI) features are lacking. The objective of this multi-center, retrospective case series study was to describe MRI characteristics of canine hemangiosarcoma affecting the central nervous system (CNS). Medical records of seven referral institutions were retrospectively reviewed. Dogs were included if they had a histopathologically confirmed diagnosis of hemangiosarcoma affecting the CNS and undergone an MRI of the brain and/or vertebral column. Lesions were independently evaluated by two observers. Twenty dogs met the inclusion criteria and one dog had both intracranial and intramedullary hemangiosarcoma. Consistent MRI features included heterogeneous (17/21) lesions in all sequences with mainly mixed signal intensity (12/21), presence of susceptibility artifact on T2*w (15/16), associated moderate to severe perilesional edema (21/21), and moderate to strong (20/21) heterogeneous (14/21) or ring-like (6/21) contrast enhancement. Intracranial hemangiosarcoma was frequently multiple and intra-axial, affecting consistently the telencephalon and no differences in MRI features were found between primary and metastatic hemangiosarcoma. This is the first MRI description of primary intracranial hemangiosarcoma and primary intracranial epithelioid hemangiosarcoma. Vertebral hemangiosarcomas were segmental poorly marginated polyostotic and highly aggressive lesions invading the thoracic vertebral canal and paraspinal tissues. Epidural hemangiosarcomas were single and well-marginated lesions in the thoracolumbar and/or lumbar region. Intramedullary hemangiosarcomas were cervical, metastatic in origin, and frequently (3/4) accompanied by intracranial lesions. These described MRI features will aid early identification of hemangiosarcoma guiding subsequent diagnostics and therapeutics.
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Affiliation(s)
- Claudia Mallol
- Diagnostic Imaging Service of the Fundació Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Spain
| | | | - Gawain Hammond
- College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Daniela Schweizer-Gorgas
- Division of Clinical Radiology, Department of Clinical Veterinary Medicine, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Steven De Decker
- Department of Veterinary Clinical Science and Services, The Royal Veterinary College, University of London, Hawkshead Lane, North Mymms, Hertfordshire, UK
| | - Rosa Novellas
- Diagnostic Imaging Service of the Fundació Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Spain.,Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Spain
| | - Yvonne Espada
- Diagnostic Imaging Service of the Fundació Hospital Clínic Veterinari, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Spain.,Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Cerdanyola del Vallés, Spain
| | - Anna Oevermann
- Division of Neurological Sciences, Department of Clinical Research and Veterinary Public Health, Vetsuisse-Faculty, University of Bern, Bern, Switzerland
| | - Maria Ortega
- Centro Clínico Veterinario Indautxu, San Mames Zumarkalea 38, Bizkaia, Bilbao, Spain
| | - Andrew Parry
- Willows Referral Service, Highlands Road, Shirley, Solihull, West Midlands, UK
| | - Ana Maria Coelho
- WEAR REFERRALS Veterinary Hospital, Bradbury, Stockton-on-Tees, UK
| | - Rita Gonçalves
- Department of Small Animal Clinical Science, Small Animal Teaching Hospital, University of Liverpool, Leahurst, Chester High Road, Neston, UK
| | - Catherine Stalin
- College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Josep Brocal
- Anderson Moores Veterinary Specialists, Bunstead Barns, Poles Lane, Hursley, Winchester, Hampshire, UK
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Santifort K, Pijnenburg J, Beukers M, Bergmann W, Bergknut N. An unusual case of intervertebral disc extrusion in a dog. VETERINARY RECORD CASE REPORTS 2021. [DOI: 10.1002/vrc2.97] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Koen Santifort
- Evidensia Small Animal Hospital Arnhem Arnhem The Netherlands
- Evidensia Small Animal Hospital ‘Hart van Brabant’ Waalwijk The Netherlands
| | | | | | - Wilhelmina Bergmann
- Division of Pathology Faculty of Veterinary Medicine, Utrecht University Utrecht The Netherlands
| | - Niklas Bergknut
- Evidensia Small Animal Hospital ‘Hart van Brabant’ Waalwijk The Netherlands
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10
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Boudreau E, Otamendi A, Levine J, Griffin JF, Gilmour L, Jeffery N. Relationship between Machine-Learning Image Classification of T 2-Weighted Intramedullary Hypointensity on 3 Tesla Magnetic Resonance Imaging and Clinical Outcome in Dogs with Severe Spinal Cord Injury. J Neurotrauma 2020; 38:725-733. [PMID: 33054592 DOI: 10.1089/neu.2020.7188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Early prognostic information in cases of severe spinal cord injury can aid treatment planning and stratification for clinical trials. Analysis of intraparenchymal signal change on magnetic resonance imaging has been suggested to inform outcome prediction in traumatic spinal cord injury. We hypothesized that intraparenchymal T2-weighted hypointensity would be associated with a lower potential for functional recovery and a higher risk of progressive neurological deterioration in dogs with acute, severe, naturally occurring spinal cord injury. Our objectives were to: 1) demonstrate capacity for machine-learning criteria to identify clinically relevant regions of hypointensity and 2) compare clinical outcomes for cases with and without such regions. A total of 95 dogs with complete spinal cord injury were evaluated. An image classification system, based on Speeded-Up Robust Features (SURF), was trained to recognize individual axial T2-weighted slices that contained hypointensity. The presence of such slices in a given transverse series was correlated with a lower chance of functional recovery (odds ratio [OR], 0.08; confidence interval [CI], 0.02-0.38; p < 10-3) and with a higher risk of neurological deterioration (OR, 0.14; 95% CI, 0.05-0.42; p < 10-3). Identification of intraparenchymal T2-weighted hypointensity in severe, naturally occurring spinal cord injury may be assisted by an image classification tool and is correlated with functional recovery.
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Affiliation(s)
- Elizabeth Boudreau
- Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas, USA
| | - Arturo Otamendi
- VCA San Francisco Veterinary Specialists, San Francisco, California, USA
| | - Jonathan Levine
- Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas, USA
| | - John F Griffin
- Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas, USA
| | - Lindsey Gilmour
- Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas, USA
| | - Nicholas Jeffery
- Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas, USA
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Debreuque M, Valin I, Prata D, De Fornel P, Thibaud JL. Case Report: Intramedullary Intervertebral Disk Extrusion in a Cat: Clinical, Computed Tomographic, High-Field Magnetic Resonance Imaging, and Outcome Findings. Front Vet Sci 2020; 7:583892. [PMID: 33134365 PMCID: PMC7579400 DOI: 10.3389/fvets.2020.583892] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/02/2020] [Indexed: 11/13/2022] Open
Abstract
Background: Intramedullary disk extrusions has rarely been described in veterinary medicine, more especially in cats, with only two cases are reported in the veterinary literature. Diagnosis may be difficult, even though clinical presentation and imaging studies, such as MRI or CT, can present specific features. Treatment and prognosis are not clearly described. Case presentation: A 10-year-old domestic shorthair female cat was evaluated for a 12 h-history of peracute-onset of paraparesis with flaccid tail and urinary and fecal incontinence. The patellar reflexes were normal, the pelvic flexor reflexes were decreased (more markedly on the right limb) and the perianal reflex was absent. The tail was flaccid, without nociception. Abdominal palpation revealed a small urinary bladder, easily expressed. Manipulation of the lumbar vertebral column elicited marked pain. Neurological examination was consistent with a L7-caudal segments lesion. A lumbosacral MRI and CT evaluations were performed and revealed a focal intramedullary hemorrhagic lesion, with an associated vertical linear tract communicating with the L5-L6 intervertebral disk space, and a suspected intramedullary focus of mineralization. These imaging findings were highly suggestive of an L5-L6 intramedullary disk extrusion. A dorsal L5-L6 laminectomy confirmed the presence of intramedullary degenerative nucleus pulposus fragments, which were surgically removed. Rapid and progressive neurological improvement was observed post-surgery. At the 1-year follow-up, right plantigrade stance and mild paraparesis were still noticed, but jumps and voluntary tail movements were observed. Occasional urinary and fecal incontinence episodes remained. Conclusions: This is the first feline case report of an intramedullary disk herniation with long-term follow-up available. Clinical description, CT and High-Field MRI findings, surgical procedure and histological results are reported, and help describing the characteristics of this rare non-compressive category of peracute intervertebral disk extrusion. Surgical management may be considered in feline cases of intramedullary disk herniation and may be associated with a good outcome.
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Affiliation(s)
- Maud Debreuque
- MICEN VET, Créteil, France.,Service de Médecine Interne, Université de Toulouse, ENVT, Toulouse, France
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12
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Kutara K, Maeta N, Kanda T, Ohnishi A, Mitsui I, Miyabe M, Shimizu Y, Okamura Y. Magnetic resonance imaging findings of an intradural extramedullary hemangiosarcoma in a dog. J Vet Med Sci 2019; 81:1527-1532. [PMID: 31484834 PMCID: PMC6863723 DOI: 10.1292/jvms.19-0260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
An 11-year-old male Miniature Dachshund was referred for acute neurological deficits in
the pelvic limbs. T2-weighted magnetic resonance imaging revealed that the spinal cord at
the L1-2 intervertebral disc space was heterogeneously hyperintense in the sagittal plane
and was mildly compressed from the ventral side by a small hypointense mass in the
transverse plane. However, the lesion showed mass enhancement and severe spinal cord
compression on post-contrast T1-weighted imaging. On three-dimensional myelography, a
“golf tee sign” was observed around the mass. Therefore, we diagnosed an intradural
extramedullary lesion. The mass was surgically removed and histologically diagnosed as a
hemangiosarcoma. The “golf tee sign” observed on magnetic resonance myelography may be
useful for distinguishing intradural extramedullary masses from intramedullary masses.
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Affiliation(s)
- Kenji Kutara
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Noritaka Maeta
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Teppei Kanda
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Akihiro Ohnishi
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Ikki Mitsui
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Masahiro Miyabe
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Yuki Shimizu
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Yasuhiko Okamura
- Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
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Bartels J, Hecht S, Conklin GA, Xiaocun S. Gadolinium contrast medium administration does not adversely affect T2*-weighted gradient recalled echo magnetic resonance imaging of the canine brain at 1.5 Tesla. Vet Radiol Ultrasound 2018; 60:184-191. [PMID: 30159943 DOI: 10.1111/vru.12682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/31/2018] [Accepted: 08/09/2018] [Indexed: 11/29/2022] Open
Abstract
As gadolinium-based contrast agents are paramagnetic and have T2 shortening effects, they have the potential to adversely affect gradient recalled echo sequences. The aim of this prospective, cross-sectional study was to evaluate the effects of gadolinium administration on T2*-weighted sequence diagnostic quality and signal intensity when imaging the canine brain. A total of 100 dogs underwent brain magnetic resonance imaging (MRI) including pre- and postcontrast T2*-weighted sequences acquired with a delay (Group A) or immediately (Group B) following gadolinium administration. Pre- and postcontrast images were subjectively compared. In dogs with intracranial enhancing masses, regions of interest were drawn on corresponding images and signal intensity ratios were calculated. The effect of degree and pattern of contrast enhancement, susceptibility artifacts, and time between contrast injection and T2*-weighted sequence acquisition on signal intensity ratio was evaluated. Overall 31 dogs had contrast enhancing intracranial masses. Subjectively, there was no difference in image quality of T2*-weighted sequences obtained before and after contrast medium administration. No significant signal intensity differences of intracranial contrast enhancing masses were found (Group A P = 0.9999; Group B P = 0.9992). Susceptibility artifacts did not differ in appearance, and there was no effect on calculated signal intensity ratio (P = 0.8142). Similarly, there was no effect of degree of enhancement or contrast heterogeneity on signal intensity ratio (P = 0.4413). No correlation was found between signal intensity ratio and the time to acquisition (P = 0.199). Administration of gadolinium-based MRI contrast agents does not adversely affect T2*-weighted imaging of the brain in dogs at 1.5 T even in the presence of contrast enhancing lesions.
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Affiliation(s)
- Janina Bartels
- Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, 37996
| | - Silke Hecht
- Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, 37996
| | - Gordon A Conklin
- Department of Small Animal Clinical Sciences, University of Tennessee, Knoxville, Tennessee, 37996
| | - Sun Xiaocun
- Office of Information Technology, University of Tennessee, Knoxville, Tennessee, 37996
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Masciarelli AE, Griffin JF, Fosgate GT, Hecht S, Mankin JM, Holmes SP, Platt SR, Kent M, Pancotto TE, Chen AV, Levine JM. Evaluation of magnetic resonance imaging for the differentiation of inflammatory, neoplastic, and vascular intradural spinal cord diseases in the dog. Vet Radiol Ultrasound 2017; 58:444-453. [DOI: 10.1111/vru.12501] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 12/11/2016] [Accepted: 01/16/2017] [Indexed: 11/29/2022] Open
Affiliation(s)
- Amanda E. Masciarelli
- Departments of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; TX 77843
| | - John F. Griffin
- Departments of Large Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; TX 77843
| | - Geoffrey T. Fosgate
- The Department of Production Animal Studies; University of Pretoria; Pretoria South Africa
| | - Silke Hecht
- The Department of Small Animal Clinical Sciences; University of Tennessee College of Veterinary Medicine; Knoxville TN 37996
| | - Joseph M. Mankin
- Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences; Texas A&M University; TX 77843
| | - Shannon P. Holmes
- The Departments of Veterinary Biosciences and Diagnostic Imaging; University of Georgia College of Veterinary Medicine; Athens GA 30602
| | - Simon R. Platt
- Small Animal Medicine and Surgery; University of Georgia College of Veterinary Medicine; Athens GA 30602
| | - Marc Kent
- Small Animal Medicine and Surgery; University of Georgia College of Veterinary Medicine; Athens GA 30602
| | - Theresa E. Pancotto
- The Department of Small Animal Clinical Sciences; Virginia-Maryland College of Veterinary Medicine; Blacksburg VA 24061
| | - Annie V. Chen
- The Department of Veterinary Clinical Sciences, College of Veterinary Medicine; Washington State University; Pullman WA 99164
| | - Jonathan M. Levine
- The Department of Production Animal Studies; University of Pretoria; Pretoria South Africa
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15
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Gomes SA, Volk HA, Packer RM, Kenny PJ, Beltran E, De Decker S. CLINICAL AND MAGNETIC RESONANCE IMAGING CHARACTERISTICS OF THORACOLUMBAR INTERVERTEBRAL DISK EXTRUSIONS AND PROTRUSIONS IN LARGE BREED DOGS. Vet Radiol Ultrasound 2016; 57:417-26. [PMID: 27038182 DOI: 10.1111/vru.12359] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 12/17/2015] [Indexed: 12/01/2022] Open
Abstract
Treatment recommendations differ for dogs with intervertebral disk extrusion vs. intervertebral disk protrusion. The aim of this retrospective, cross-sectional study was to determine whether clinical and magnetic resonance imaging (MRI) variables could be used to predict a diagnosis of thoracolumbar intervertebral disk extrusion or protrusion in dogs. Dogs were included if they were large breed dogs, had an MRI study of the thoracolumbar or lumbar vertebral column, had undergone spinal surgery, and had the type of intervertebral disk herniation (intervertebral disk extrusion or protrusion) clearly stated in surgical reports. A veterinary neurologist unaware of surgical findings reviewed MRI studies and recorded number, location, degree of degeneration and morphology of intervertebral disks, presence of nuclear clefts, disk space narrowing, extent, localization and lateralization of herniated disk material, degree of spinal cord compression, intraparenchymal intensity changes, spondylosis deformans, spinal cord swelling, spinal cord atrophy, vertebral endplate changes, and presence of extradural hemorrhage. Ninety-five dogs were included in the sample. Multivariable statistical models indicated that longer duration of clinical signs (P = 0.01), midline instead of lateralized disk herniation (P = 0.007), and partial instead of complete disk degeneration (P = 0.01) were associated with a diagnosis of intervertebral disk protrusion. The presence of a single intervertebral herniation (P = 0.023) and dispersed intervertebral disk material not confined to the disk space (P = 0.06) made a diagnosis of intervertebral disk extrusion more likely. Findings from this study identified one clinical and four MRI variables that could potentially facilitate differentiating intervertebral disk extrusions from protrusions in dogs.
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Affiliation(s)
- Sergio A Gomes
- Department of Clinical Science and Services, Royal Veterinary College, University of London, North Mymms, Hertfordshire, AL97TA, Hatfield, UK
| | - Holger A Volk
- Department of Clinical Science and Services, Royal Veterinary College, University of London, North Mymms, Hertfordshire, AL97TA, Hatfield, UK
| | - Rowena Ma Packer
- Department of Clinical Science and Services, Royal Veterinary College, University of London, North Mymms, Hertfordshire, AL97TA, Hatfield, UK
| | - Patrick J Kenny
- Department of Clinical Science and Services, Royal Veterinary College, University of London, North Mymms, Hertfordshire, AL97TA, Hatfield, UK
| | - Elsa Beltran
- Department of Clinical Science and Services, Royal Veterinary College, University of London, North Mymms, Hertfordshire, AL97TA, Hatfield, UK
| | - Steven De Decker
- Department of Clinical Science and Services, Royal Veterinary College, University of London, North Mymms, Hertfordshire, AL97TA, Hatfield, UK
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16
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De Risio L. A Review of Fibrocartilaginous Embolic Myelopathy and Different Types of Peracute Non-Compressive Intervertebral Disk Extrusions in Dogs and Cats. Front Vet Sci 2015; 2:24. [PMID: 26664953 PMCID: PMC4672181 DOI: 10.3389/fvets.2015.00024] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Accepted: 07/31/2015] [Indexed: 11/13/2022] Open
Abstract
This review discusses terminology, pathological, clinical, and magnetic resonance imaging (MRI) findings, treatment, outcome, and prognostic factors of fibrocartilaginous embolic myelopathy (FCEM), acute non-compressive nucleus pulposus extrusion (ANNPE), and intradural/intramedullary intervertebral disk extrusion (IIVDE). FCEM, ANNPE, and IIVDE have a similar clinical presentation characterized by peracute onset of neurological dysfunction that is generally non-progressive after the initial 24-48 h. Differentiating between these conditions can be challenging, however, certain clinical and imaging findings can help. FCEM can occur in both adult and immature animals, whereas ANNPE or IIVDE have been reported only in animals older than 1 year. In dogs, ANNPE and IIVDE most commonly occur in the intervertebral disk spaces between T12 and L2, whereas FCEM has not such site predilection. In cats, FCEM occurs more frequently in the cervical spinal cord than in other locations. Data on cats with ANNPE and IIVDE are limited. Optimal MRI definition and experience in neuroimaging can help identify the findings that allow differentiation between FCEM, ANNPE, and IIVDE. In animals with ANNPE and IIVDE, the affected intervertebral disk space is often narrowed and the focal area of intramedullary hyperintensity on T2-weighted images is located above the affected intervertebral disk space. In dogs with ANNPE signal changes associated with the extruded nucleus pulposus and epidural fat disruption can be identified in the epidural space dorsal to the affected intervertebral disk. Identification of a linear tract (predominantly hyperintense on T2-weighted images, iso to hypointense on T1-weighted images and hypointense on T2*-weighted gradient recall echo images) extending from the intervertebral disk into the spinal cord parenchyma is highly suggestive of IIVDE. Treatment of FCEM and ANNPE is conservative. Dogs reported with IIVDE have been managed either conservatively or surgically. Prognostic factors include degree of neurological dysfunction (particularly loss of nociception) and disease-specific MRI variables.
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Affiliation(s)
- Luisa De Risio
- Centre for Small Animal Studies, Animal Health Trust , Newmarket, Suffolk , UK
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