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James FMK, da Costa RC, Fauber A, Peregrine AS, McEwen B, Parent JM, Bergman R. Clinical and MRI Findings in Three Dogs with Polycystic Meningiomas. J Am Anim Hosp Assoc 2012; 48:331-8. [DOI: 10.5326/jaaha-ms-5774] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
One spayed female Labrador retriever and two castrated male golden retrievers were evaluated for chronic (i.e., ranging from 3 wk to 24 wk) neurologic signs localizable to the prosencephalon. Signs included seizures, circling, and behavior changes. MRI demonstrated extra-axial, contrast-enhancing, multiloculated, fluid-filled, cyst-like lesions with a mass effect, causing compression and displacement of brain parenchyma. Differential diagnoses included cystic neoplasm, abscess or other infectious cyst (e.g., alveolar hydatid cyst), or fluid-filled anomaly (e.g., arachnoid cyst). The cyst-like lesions were attached to the rostral falx cerebri in all cases. In addition, case 2 had a second polycystic mass at the caudal diencephalon. Surgical biopsy (case 3 with a single, rostral tumor via transfrontal craniectomy) and postmortem histology (in cases 1 and 2) confirmed polycystic meningiomas. Tumor types were transitional (cases 1 and 3) and fibrous (case 2), with positive immunohistochemical staining for vimentin. Case 3 was also positive for E-cadherin, s100, and CD34. In all cases, staining was predominantly negative for glial fibrillary acid protein and pancytokeratins, supporting a diagnosis of meningioma. This report describes the first cases of polycystic meningiomas in dogs. Polycystic meningiomas are a rare, but important, addition to the differential diagnoses for intracranial cyst-like lesions, significantly affecting planning for surgical resection and other therapeutic interventions.
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Affiliation(s)
- Fiona M. K. James
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
| | - Ronaldo C. da Costa
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
| | - Amy Fauber
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
| | - Andrew S. Peregrine
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
| | - Beverly McEwen
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
| | - Joane M. Parent
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
| | - Robert Bergman
- Department of Clinical Studies (F.J., R.C., J.P.), Department of Pathobiology (A.P.), and Animal Health Laboratory (B.M.), Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada; Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN (A.F.); and Carolina Veterinary Specialists, Charlotte, NC (R.B.)
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Wisner ER, Dickinson PJ, Higgins RJ. Magnetic resonance imaging features of canine intracranial neoplasia. Vet Radiol Ultrasound 2011; 52:S52-61. [PMID: 21392157 DOI: 10.1111/j.1740-8261.2010.01785.x] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Although histologic examination following stereotactic or surgical brain biopsy is required for definitive antemortem diagnosis of intracranial neoplasms, these tumors are often associated with magnetic resonance (MR) imaging features that warrant a presumptive or prioritized differential diagnosis. The MR imaging features of common canine central nervous system (CNS), adenohypophyseal, and metastatic intracranial neoplasms are reviewed. Characterization of neoplasms by histologic type and biological grade is based on the 2007 World Health Organization classification system for CNS tumors in humans.
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Affiliation(s)
- Erik R Wisner
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
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Bathen-Noethen A, Stein VM, Puff C, Baumgaertner W, Tipold A. Magnetic resonance imaging findings in acute canine distemper virus infection. J Small Anim Pract 2008; 49:460-7. [PMID: 18482329 DOI: 10.1111/j.1748-5827.2008.00552.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Demyelination is the prominent histopathological hallmark in the acute stage of canine distemper virus infection. Magnetic resonance imaging is an important diagnostic tool in human beings to determine demyelination in the brain, for example in multiple sclerosis. Five young dogs with clinically suspected canine distemper virus infection were subjected to magnetic resonance imaging of the brain and histopathological and immunohistochemical examinations. Hyperintense lesions and loss of contrast between grey and white matter were detected in T2-weighted images in the cerebellum and/or in the brainstem of three dogs, which correlated with demyelination demonstrated in histopathological examination. Furthermore, increased signal intensities in T2-weighted images were seen in the temporal lobe of four dogs with no evidence of demyelination. Magnetic resonance imaging seems to be a sensitive tool for the visualisation of in vivo myelination defects in dogs with acute canine distemper virus infection. Postictal oedema and accumulation of antigen positive cells have to be considered an important differential diagnosis.
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Affiliation(s)
- A Bathen-Noethen
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine, Bischofsholer Damm 15, D-30173 Hannover, Germany
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Marioni-Henry K, Schwarz T, Weisse C, Muravnick KB. Cystic nasal adenocarcinoma in a cat treated with piroxicam and chemoembolization. J Am Anim Hosp Assoc 2007; 43:347-51. [PMID: 17975218 DOI: 10.5326/0430347] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A 13-year-old, castrated male Siamese cat was presented with a 4-month history of recurrent seizures and bilateral conjunctivitis and rhinitis. Computed tomography of the brain and nose revealed a cystic lesion in the cranial cavity that compressed the brain and invaded the nose. Nasal biopsy revealed a nasal adenocarcinoma. The cat was treated with intermittent antibiotics, phenobarbital, piroxicam, and chemoembolization; it survived for 2 years after diagnosis.
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Affiliation(s)
- Katia Marioni-Henry
- Department of Small Animal Clinical Sciences, Veterinary Teaching Hospital, University of Tennessee, Knoxville, Tennessee 37996-4544, USA
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Kitagawa M, Okada M, Oogushi N, Dei H, Yamamura H, Kanayama K, Sakai T. A canine case of gliosis with cyst formation in the posterior fossa. J Vet Med Sci 2002; 64:611-4. [PMID: 12185316 DOI: 10.1292/jvms.64.611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 5-month-old male Great Pyrenees with symptoms of convulsions, circling, and a head tilt was referred to the Animal Medical Center of Nihon University. On a magnetic resonance image (MRI), a cyst in the posterior fossa was noted and a part of the cyst enhanced by gadoteridol. Based on MRI and clinical findings, the patient was tentatively diagnosed with a cyst formation tumor, and an operation to open the cyst and remove the part enhanced by contrast was performed. Postoperatively, the clinical course was good. Pathologically, the removed tissue was diagnosed as a gliosis with cyst formation.
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Affiliation(s)
- Masato Kitagawa
- Department of Preventive Veterinary Medicine and Animal Health, Nihon University School of Veterinary Medicine, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
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