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Dos Santos EC, Summers BA, Elbert JA, Miller DM, Rissi DR. Canine glioma in the first year of life: 5 cases. J Vet Diagn Invest 2024; 36:579-582. [PMID: 38561905 DOI: 10.1177/10406387241242733] [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] [Indexed: 04/04/2024] Open
Abstract
Most canine gliomas occur in adult and aged dogs, and reports in puppies < 12-mo-old are exceedingly rare. Here we describe the occurrence of gliomas in 5 dogs ≤ 12-mo-old. The affected patients (4 males, 1 female) were 3-12-mo-old (x̄ = 6.6-mo-old). None of the dogs were brachycephalic. Clinical signs consisted of dullness (2 cases), seizures (2 cases), vestibular signs, and deafness (1 case each). All patients were euthanized. Grossly, neoplasms were pale-tan or red, soft masses in the telencephalon (4 cases) or gelatinous leptomeningeal thickening in the brain and spinal cord (1 case). Neoplasms were classified as astrocytomas (3 cases) and oligodendrogliomas (2 cases) based on histology or histology and IHC. Our findings confirm that, while exceptionally rare, canine gliomas occur in the first year of life, and are clinically, morphologically, and immunohistochemically similar to gliomas in adult and aged dogs.
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Affiliation(s)
- Esdras C Dos Santos
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Brian A Summers
- Melbourne Veterinary School, University of Melbourne, Werribee, Victoria, Australia
| | - Jessica A Elbert
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Doris M Miller
- Athens Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
| | - Daniel R Rissi
- Department of Pathology, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
- Athens Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Georgia, Athens, GA, USA
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Muller K, Kim E, Lebowitz A, Daverio H. A High Grade Astrocytoma with Pilocytic Morphology in a 5-Month-Old American Bulldog. Vet Sci 2022; 9:vetsci9100580. [PMID: 36288193 PMCID: PMC9609793 DOI: 10.3390/vetsci9100580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/16/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
Simple Summary Dogs are valuable models for spontaneous intracranial neoplasia in humans. The most common intracranial neoplasm in dogs is meningioma, followed by glioma and choroid plexus tumors. Pilocytic astrocytoma (PA) is a form of glioma and is a common childhood and adolescent tumor in humans. There have been two previous reports of PA in dogs. These cases were both adult dogs and the clinical and imaging features were not described. This report describes a 23-week-old female intact American Bulldog with a 2-week progressive history of neurologic dysfunction. Magnetic resonance imaging (MRI) revealed a large hemorrhagic mass that was confirmed on post-mortem examination to be a high-grade astrocytoma with pilocytic morphology. This case is the first to report a high-grade astrocytoma with pilocytic morphology in a juvenile dog. Abstract A 23-week-old female intact American Bulldog was presented for a two-week history of progressive circling to the right, twitching, and altered mentation. Magnetic resonance imaging (MRI) revealed a non-contrast enhancing hemorrhagic mass centered in the right thalamus with concurrent subdural and intraventricular hemorrhage. Post-mortem histologic examination of the brain confirmed a mass centered on the thalamus with histomorphologic features consistent with a high-grade astrocytoma with pilocytic morphology. To the authors’ knowledge, the present case is the first to report clinical and imaging characteristics of a high-grade astrocytoma with pilocytic morphology in a young dog.
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Cranial Spinal Spreading of Canine Brain Gliomas after Hypofractionated Volumetric-Modulated Arc Radiotherapy and Concomitant Temozolomide Chemotherapy: A Four-Case Report. Vet Sci 2022; 9:vetsci9100541. [PMID: 36288154 PMCID: PMC9608067 DOI: 10.3390/vetsci9100541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/20/2022] [Accepted: 09/27/2022] [Indexed: 11/29/2022] Open
Abstract
Gliomas are the second-most-common primary brain tumors in dogs. Surgery and radiotherapy are established treatment approaches with similar median survival time, whereas conventional chemotherapy is burdened by severe adverse effects. Spinal and leptomeningeal spread of gliomas have been described following radiotherapy treatment alone. The purpose of this study was to evaluate the outcome for four dogs with primary high-grade gliomas in the forebrain without evidence, at diagnosis, of neoplastic invasion along the spinal cord, that were treated with concomitant chemotherapy (temozolomide) and hypofractionated volumetric-modulated arc radiotherapy (VMAT-RT). Temozolomide was selected for its radiosensitive properties, and radiotherapy dose protocols of 37 Gy in 7 fractions or 42 Gy in 10 fractions were used. After an initial complete or partial response, tumors recurred across the cranial-spinal pathway. Post-mortem macroscopic examinations confirmed swollen spinal cord and hyperemic meningeal sleeve, with nodular lesions on the meningeal surface. Microscopically, infiltration of the spinal cord and meninges by neoplastic cells (with features of oligodendrogliomas) were observed. This work seems to suggest that the entire central nervous system should be investigated in diagnostic examinations of canine gliomas. Dose-escalation trials and/or spinal cord prophylaxis treatment could also be evaluated to prevent tumor progression.
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Manzanedo‐Delgado A, Mason S, Pumarola M, Stabile F. Diagnostic imaging, treatment and outcome in a 14‐month‐old Dobermann with brainstem gemistocytic astrocytoma. VETERINARY RECORD CASE REPORTS 2021. [DOI: 10.1002/vrc2.202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - Sarah Mason
- Department of Oncology and Radiology Southfields Veterinary Specialists Basildon UK
| | - Marti Pumarola
- Faculty of Veterinary Unit of Murine and Comparative Pathology (UPMiC) Autonomous University of Barcelona Bellaterra Barcelona Spain
| | - Fabio Stabile
- Department of Neurology/Neurosurgery Southfields Veterinary Specialists Basildon UK
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Miller AD, Miller CR, Rossmeisl JH. Canine Primary Intracranial Cancer: A Clinicopathologic and Comparative Review of Glioma, Meningioma, and Choroid Plexus Tumors. Front Oncol 2019; 9:1151. [PMID: 31788444 PMCID: PMC6856054 DOI: 10.3389/fonc.2019.01151] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 10/16/2019] [Indexed: 12/22/2022] Open
Abstract
In the dog, primary intracranial neoplasia represents ~2-5% of all cancers and is especially common in certain breeds including English and French bulldogs and Boxers. The most common types of primary intracranial cancer in the dog are meningioma, glioma, and choroid plexus tumors, generally occurring in middle aged to older dogs. Much work has recently been done to understand the characteristic imaging and clinicopathologic features of these tumors. The gross and histologic landscape of these tumors in the dog compare favorably to their human counterparts with many similarities noted in histologic patterns, subtype, and grades. Data informing the underlying molecular abnormalities in the canine tumors have only begun to be unraveled, but reveal similar pathways are mutated between canine and human primary intracranial neoplasia. This review will provide an overview of the clinicopathologic features of the three most common forms of primary intracranial cancer in the dog, delve into the comparative aspects between the dog and human neoplasms, and provide an introduction to current standard of care while also highlighting novel, experimental treatments that may help bridge the gap between canine and human cancer therapies.
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Affiliation(s)
- Andrew D. Miller
- Section of Anatomic Pathology, Department of Biomedical Sciences, Cornell University College of Veterinary Medicine, Ithaca, NY, United States
| | - C. Ryan Miller
- Division of Neuropathology, Department of Pathology, O'Neal Comprehensive Cancer Center and Comprehensive Neuroscience Center, University of Alabama School of Medicine, Birmingham, AL, United States
| | - John H. Rossmeisl
- Section of Neurology and Neurosurgery, Veterinary and Comparative Neuro-Oncology Laboratory, Department of Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, Blacksburg, VA, United States
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Hubbard ME, Arnold S, Bin Zahid A, McPheeters M, Gerard O’Sullivan M, Tabaran AF, Hunt MA, Pluhar GE. Naturally Occurring Canine Glioma as a Model for Novel Therapeutics. Cancer Invest 2018; 36:415-423. [DOI: 10.1080/07357907.2018.1514622] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Molly E. Hubbard
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, USA
| | - Susan Arnold
- College of Veterinary Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Abdullah Bin Zahid
- Division of Neurosurgery, Hennepin County Medical Center, Minneapolis, MN, USA
| | | | - M. Gerard O’Sullivan
- College of Veterinary Medicine, University of Minnesota, Minneapolis, MN, USA
- Comparitive Pathology Shared Resource at Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Alexandru-Flaviu Tabaran
- College of Veterinary Medicine, University of Minnesota, Minneapolis, MN, USA
- Comparitive Pathology Shared Resource at Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Matthew A. Hunt
- Department of Neurosurgery, University of Minnesota, Minneapolis, MN, USA
| | - G. Elizabeth Pluhar
- College of Veterinary Medicine, University of Minnesota, Minneapolis, MN, USA
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Engel S, Hilling KM, Meuten TK, Frank CB, Marolf AJ. Glioblastoma Multiforme with Hypodipsic Hypernatremia in a Seven-Month-Old Golden Retriever. J Am Anim Hosp Assoc 2016; 52:319-24. [PMID: 27487344 DOI: 10.5326/jaaha-ms-6382] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Primary hypodipsic hypernatremia is a rarely reported disease in dogs. Reported underlying causes associated with this disease in dogs include congenital malformations, encephalitis, intracranial neoplasia, and pressure atrophy of the hypothalamus secondary to hydrocephalus. The dog in this report had an infiltrative neoplastic disorder, likely causing damage to the hypothalamic osmoreceptors responsible for the thirst generation. The neoplastic process was identified histopathologically as glioblastoma multiforme, an unusual tumor to occur in a dog this young. A tumor of the central nervous system causing physical destruction of the osmoreceptors has rarely been reported in dogs and none of the previously reported cases involved a glial cell tumor.
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Affiliation(s)
- Stephanie Engel
- From the Clinical Sciences Department (S.E.); the Microbiology, Immunology and Pathology Department, College of Veterinary Medicine and Biomedical Sciences (T.K.M., C.B.F.); and the Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences (A.J.M.), Colorado State University, Fort Collins, CO; and the Animal Hospital Specialty Center, Highlands Ranch, CO (K.M.H.)
| | - Karen Marie Hilling
- From the Clinical Sciences Department (S.E.); the Microbiology, Immunology and Pathology Department, College of Veterinary Medicine and Biomedical Sciences (T.K.M., C.B.F.); and the Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences (A.J.M.), Colorado State University, Fort Collins, CO; and the Animal Hospital Specialty Center, Highlands Ranch, CO (K.M.H.)
| | - Travis Kuder Meuten
- From the Clinical Sciences Department (S.E.); the Microbiology, Immunology and Pathology Department, College of Veterinary Medicine and Biomedical Sciences (T.K.M., C.B.F.); and the Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences (A.J.M.), Colorado State University, Fort Collins, CO; and the Animal Hospital Specialty Center, Highlands Ranch, CO (K.M.H.)
| | - Chad Brendan Frank
- From the Clinical Sciences Department (S.E.); the Microbiology, Immunology and Pathology Department, College of Veterinary Medicine and Biomedical Sciences (T.K.M., C.B.F.); and the Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences (A.J.M.), Colorado State University, Fort Collins, CO; and the Animal Hospital Specialty Center, Highlands Ranch, CO (K.M.H.)
| | - Angela J Marolf
- From the Clinical Sciences Department (S.E.); the Microbiology, Immunology and Pathology Department, College of Veterinary Medicine and Biomedical Sciences (T.K.M., C.B.F.); and the Environmental and Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences (A.J.M.), Colorado State University, Fort Collins, CO; and the Animal Hospital Specialty Center, Highlands Ranch, CO (K.M.H.)
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8
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Petrukovich BN, Kilburn GA. What Is Your Neurologic Diagnosis? Astrocytoma affecting the pontine region of the brainstem. J Am Vet Med Assoc 2015; 247:1015-7. [PMID: 26480008 DOI: 10.2460/javma.247.9.1015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Dickinson P. Advances in diagnostic and treatment modalities for intracranial tumors. J Vet Intern Med 2014; 28:1165-85. [PMID: 24814688 PMCID: PMC4857954 DOI: 10.1111/jvim.12370] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 02/24/2014] [Accepted: 03/25/2014] [Indexed: 12/23/2022] Open
Abstract
Intracranial neoplasia is a common clinical condition in domestic companion animals, particularly in dogs. Application of advances in standard diagnostic and therapeutic modalities together with a broad interest in the development of novel translational therapeutic strategies in dogs has resulted in clinically relevant improvements in outcome for many canine patients. This review highlights the status of current diagnostic and therapeutic approaches to intracranial neoplasia and areas of novel treatment currently in development.
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Affiliation(s)
- P.J. Dickinson
- Department of Surgical and Radiological SciencesSchool of Veterinary MedicineUniversity of California DavisDavisCA
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Mateo I, Orlandi R, Vazquez F, Muñoz A. Brainstem oligodendroglioma in a puppy. J Am Anim Hosp Assoc 2013; 49:353-6. [PMID: 23861262 DOI: 10.5326/jaaha-ms-5924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A 5 mo old male golden retriever presented for evaluation of an acute onset, progressive neurologic disease. Although computed tomography (CT) was unremarkable, MRI identified an ill-defined mass located in the medulla, which was considered likely responsible for the clinical signs. The imaging features closely resembled the classic features of human brainstem gliomas in the pediatric population. Histopathologic examination confirmed the lesion to be an anaplastic oligodendroglioma.
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Affiliation(s)
- Isidro Mateo
- Servicio de Neurología, Hospital Clínico Veterinario, Universidad Alfonso X el Sabio, Madrid, Spain.
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11
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Song RB, Vite CH, Bradley CW, Cross JR. Postmortem evaluation of 435 cases of intracranial neoplasia in dogs and relationship of neoplasm with breed, age, and body weight. J Vet Intern Med 2013; 27:1143-52. [PMID: 23865437 DOI: 10.1111/jvim.12136] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 04/30/2013] [Accepted: 05/28/2013] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Intracranial neoplasia of dogs is frequently encountered in veterinary medicine, but large-scale studies on prevalence are lacking. OBJECTIVES To determine the prevalence of intracranial neoplasia in a large population of dogs examined postmortem and the relationship between breed, age, and weight with the presence of primary intracranial neoplasms. ANIMALS All dogs that underwent postmortem examination from 1986 through 2010 (n = 9,574), including dogs with a histopathologic diagnosis of primary (n = 227) and secondary (n = 208) intracranial neoplasia. METHODS Retrospective evaluation of medical records from 1986 through 2010. RESULTS Overall prevalence of intracranial neoplasia in this study's population of dogs was 4.5%. A statistically significant higher prevalence of primary intracranial neoplasms was found in dogs with increasing age and body weights. Dogs ≥15 kg had an increased risk of meningioma (odds ratio 2.3) when compared to dogs <15 kg. The Boxer, Boston Terrier, Golden Retriever, French Bulldog, and Rat Terrier had a significantly increased risk of primary intracranial neoplasms while the Cocker Spaniel and Doberman Pinscher showed a significantly decreased risk of primary intracranial neoplasms. CONCLUSIONS AND CLINICAL IMPORTANCE Intracranial neoplasia in dogs might be more common than previous estimates. The study suggests that primary intracranial neoplasia should be a strong differential in older and larger breed dogs presenting with signs of nontraumatic intracranial disease. Specific breeds have been identified with an increased risk, and others with a decreased risk of primary intracranial neoplasms. The results warrant future investigations into the role of age, size, genetics, and breed on the development of intracranial neoplasms.
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Affiliation(s)
- R B Song
- Department of Clinical Studies, School of Veterinary Medicine , University of Pennsylvania, Philadelphia, PA
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12
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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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13
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Wong M, Glass E, DeLahunta A, Jackson B. Intracranial anaplastic astrocytoma in a 19-week-old boxer dog. J Small Anim Pract 2011; 52:325-8. [DOI: 10.1111/j.1748-5827.2011.01066.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Schmidt JM, North SM, Freeman KP, Ramiro-Ibañez F. Canine paediatric oncology: retrospective assessment of 9522 tumours in dogs up to 12 months (1993-2008). Vet Comp Oncol 2010; 8:283-92. [DOI: 10.1111/j.1476-5829.2010.00226.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Affiliation(s)
- G. Stoica
- Department of Veterinary Pathobiology, Texas A&M University, College Station, Texas
| | - J. Levine
- Small Animal Clinical Sciences, Texas A&M University, College Station, Texas
| | - J. Wolff
- MD Anderson Children’s Cancer Center, Houston, Texas
| | - K. Murphy
- Department of Genetics and Biochemistry, Clemson University, Clemson, South Carolina
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Hecht S, Adams WH. MRI of Brain Disease in Veterinary Patients Part 2: Acquired Brain Disorders. Vet Clin North Am Small Anim Pract 2010; 40:39-63. [DOI: 10.1016/j.cvsm.2009.09.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Walmsley GL, Chandler K, Davies ES, Lamb CR, Smyth B, Summers BA. Multi-focal cerebral oligoastrocytoma in a puppy. J Small Anim Pract 2009; 50:435-9. [PMID: 19689673 DOI: 10.1111/j.1748-5827.2009.00761.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A nine-month-old puppy was presented for investigation of seizures. Neurological deficits were found localising to the prosencephalon, mesencephalon and myelencephalon. Magnetic resonance imaging identified multiple, large lesions involving both cerebral hemispheres. Management with antiepileptic and immunomodulatory drugs was instituted; however, the seizures became progressively refractory and the puppy was euthanased. Histopathology following post-mortem examination found a mixed glial cell tumour with discrete areas where neoplastic cells appeared oligodendroglial or astrocytic. Primary intracranial neoplasia is a rare cause of neurological disease in young dogs. Moreover, this case is unusual in terms of both the mixed glial nature of the neoplasm and also its multi-focal distribution.
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Affiliation(s)
- G L Walmsley
- Department of Veterinary Clinical Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Herts, UK
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Gibson CJ, Parry NMA, Jakowski RM, Eshar D. Anaplastic Astrocytoma in the Spinal Cord of an African Pygmy Hedgehog (Atelerix albiventris). Vet Pathol 2008; 45:934-8. [DOI: 10.1354/vp.45-6-934] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A 2–year-old, female hedgehog presented with an 8–month history of progressive, ascending paresis/paralysis and was tentatively diagnosed with wobbly hedgehog syndrome. She died awaiting further diagnostic tests, and the owners consented to postmortem examination. Grossly, the bladder was large and flaccid and the cervical and lumbar spinal cord were regionally enlarged, light grey, and friable with multifocal hemorrhages. The thoracic spinal cord was grossly normal. Microscopically all regions of the spinal cord had similar changes, although the cervical and lumbar sections were most severely affected. These regions were completely effaced by a moderately cellular infiltration of highly pleomorphic polygonal to spindle shaped cells, mineralization, and necrosis, which were most consistent with anaplastic astrocytoma. The thoracic spinal cord white matter was similarly infiltrated by the neoplastic cells, with perivascular extension into the otherwise normal grey matter. A diagnosis of anaplastic astrocytoma was confirmed using immunohistochemical stains that were positive for glial fibrillary acidic protein and S100.
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Affiliation(s)
- C. J. Gibson
- Tufts University Cummings School of Veterinary Medicine, Department of Biomedical Sciences, Section of Pathology, North Grafton, MA
| | - N. M. A. Parry
- Tufts University Cummings School of Veterinary Medicine, Department of Biomedical Sciences, Section of Pathology, North Grafton, MA
| | - R. M. Jakowski
- Tufts University Cummings School of Veterinary Medicine, Department of Biomedical Sciences, Section of Pathology, North Grafton, MA
| | - D. Eshar
- Department of Clinical Sciences, North Grafton, MA
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Abstract
A primary cerebral hemangiosarcoma was identified in a 6-week-old, female, cross-breed dog. Grossly, the tumor mass was poorly demarcated from the adjacent neuropil, hemorrhagic, and caused effacement of the right dorsolateral cerebral hemisphere. Microscopically, the tumor was composed of an infiltrative mass of small vascular channels lined by neoplastic endothelial cells that stained variably with factor VIII-related antigen and negatively with glial fibrillary acidic protein. This is the first description of a primary intracranial hemangiosarcoma in an immature dog.
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Affiliation(s)
- L J Gabor
- Diagnostic Services, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PEI, C1A 4P3 Canada.
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