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Veterinary Neuropathology: Essentials of Theory and Practice - Vandevelde / Higgins / Oevermann

Veterinary Neuropathology: Essentials of Theory and Practice - Vandevelde / Higgins / Oevermann

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Author: Marc Vandevelde, Robert J. Higgins, Anna Oevermann Language: English Finishing: Hardcover, 210 pages ISBN: 978-0-470-67056-9 Edition Number: 2012 Author information: Marc Vandevelde Dr.med.vet., DECVN is a professor of neurology in the Division of Neurological Sciences, Vetsuisse Faculty at the University of Bern, Switzerland. Robert J. Higgins BVSc, MS, PhD, DACVP is a professor of pathology in...
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Descripción completa de: Veterinary Neuropathology: Essentials of Theory and Practice - Vandevelde / Higgins / Oevermann

Author: Marc Vandevelde, Robert J. Higgins, Anna Oevermann

Language: English

Finishing: Hardcover, 210 pages

ISBN978-0-470-67056-9

Edition Number: 2012

Author information:

Marc Vandevelde Dr.med.vet., DECVN is a professor of neurology in the Division of Neurological Sciences, Vetsuisse Faculty at the University of Bern, Switzerland.

Robert J. Higgins BVSc, MS, PhD, DACVP is a professor of pathology in the Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, at the University of California Davis, Davis, California, USA.

Anna Oevermann Dr. med.vet., DECVP is an associate professor of neuropathology in the Division of Neurological Sciences , Vetsuisse Faculty  at the University of Bern, Switzerland.

Description:

Introducing the theoretical and practical basics of veterinary neuropathology, this concise and well illustrated book is an essential basic diagnostic guide for pathologists, neurologists and diagnostic imaging specialists. It presents readers with strategies to deal with neuropathological problems, showing how to interpret gross and histological lesions using a systematic approach based on pattern recognition. 

It starts with an overview of the general principles of neuroanatomy, neuropathological techniques, basic tissue reaction patterns, and recognition of major lesion patterns.  The book goes on to cover vascular diseases, inflammatory diseases, trauma, congenital malformations, metabolic-toxic diseases, neoplasia and degenerative diseases mainly of the central nervous system. In the respective chapters pathologists can quickly find information to support their daily diagnostic workup for both small and large domestic species.  Based on the authors’ extensive diagnostic and post graduate teaching experience as well as the inclusion of MRI as it relates to neuropathology, this book also offers a comprehensive but basic analysis of veterinary neuropathology that neurologists and other MRI users will find very useful.

Table of contents:

Preface ix

Foreword x

1 General neuropathology 1

1.1 Principles of neuroanatomy for diagnostic neuropathologists 1

1.1.1 Anatomical orientation by using the ventricular system 1

1.1.2 Major anatomical regions of interest 2

1.1.3 Histological neuroanatomy 7

1.2 Neuropathological techniques 11

1.2.1 Necropsy techniques 11

1.2.2 Brain sectioning, macroscopic inspection and sampling for histology 12

1.3 Basic tissue reaction patterns 14

1.3.1 Reactions of neurons to injury 14

1.3.2 Oligodendrocytes 20

1.3.3 Astrocytes 20

1.3.4 Microglia/macrophages 22

1.3.5 CSF spaces 23

1.3.6 Blood vessels 23

1.3.7 Disturbance of water balance: edema 24

1.3.8 Artifacts, postmortem degeneration, pseudolesions and old age 26

1.4 Recognizing major lesion patterns 28

1.4.1 The major lesion patterns 28

1.4.2 Lesion distribution pattern 31

1.4.3 Classifi cation of neurological diseases 31

1.4.4 General strategy 33

1.5 Neuropathology in the clinics: magnetic resonance imaging (MRI) 33

1.5.1 Basic MRI physics 33

1.5.2 Principles of interpretation 34

Further reading 36

Neuropathology general 36

Neurology/functional neuroanatomy 36

Neuroanatomy 37

Techniques for PNS and muscle 37

Basic tissue reaction patterns 37

Edema 37

Artifacts, pseudolesions, old age 37

Magnetic resonance imaging 37

2 Vascular disorders 38

2.1 Pathophysiology of ischemia 38

2.2 General strategy for diagnosing vascular lesions 38

2.3 Common vascular lesions 39

2.3.1 Vascular lesions of the brain 39

2.3.2 Vascular lesions of the spinal cord 44

2.3.3 Ischemia in the peripheral nervous system and muscles 46

Further reading 46

Cerebral infarcts 46

Hemorrhage 46

Hypertensive encehalopathy 46

Fibrocartilagenous emboli 47

Aortic thrombosis 47

3 Inflammatory diseases 48

3.1 Pathophysiology of inflammation 48

3.1.1 Entry and effect of infectious agents in the nervous system 48

3.1.2 Immune reaction of the host against the infectious agent in the CNS 48

3.1.3 Morphological aspects of the immune response 49

3.2 General strategy for diagnosis of inflammatory lesions 50

3.2.1 Recognizing major inflammatory reaction patterns 51

3.2.2 Determining the distribution pattern of the lesions 52

3.2.3 Specifi c features 52

3.3 Common CNS infections 54

3.3.1 Neurotropic viral infections 54

3.3.2 Viral granulomatous inflammation 58

3.3.3 Viral vasculitis 60

3.3.4 Viral leukoencephalitis 61

3.3.5 Bacterial infections 63

3.3.6 Mycotic and algal infections 68

3.3.7 Protozoal infections 69

3.3.8 Helminth infections 70

3.4 Non-infectious and immune-mediated inflammatory lesions 72

3.4.1 Definition 72

3.4.2 Neurological diseases assumed to be immune-mediated 73

Further reading 79

General 79

Neurotropic viral infections 79

Viral granulomatous infections 79

Viral vasculitis 79

Demyelinating viral infections 79

Bacterial infections 79

Fungal infections 80

Protozoal infections 80

Helminth infections 80

Non-infectious and Immune-mediated inflammatory disorders 80

4 Trauma 81

4.1 Pathophysiology of CNS trauma 81

4.1.1 Pathogenesis of brain trauma 81

4.1.2 Pathogenesis of spinal cord trauma 82

4.2 General strategy for diagnosis of traumatic CNS lesions 84

4.3 Traumatic nervous system diseases 85

4.3.1 Trauma of the brain 85

4.3.2 Traumatic spinal cord lesions 87

4.3.3 Trauma in the peripheral nervous system 89

Further reading 90

Pathophysiology of CNS trauma 90

Brain trauma 91

Intervertebral disc disease 91

Spinal malformations 91

Wobbler syndrome 91

Other causes of cord compression 91

Cauda equina syndrome 91

5 Congenital malformations 92

5.1 Pathophysiology 92

5.1.1 Ontogeny of the CNS 92

5.1.2 Etiology 92

5.2 General strategy for diagnosing anomalies of the CNS 93

5.3 Common malformations 93

5.3.1 Neural tube closure defects 93

5.3.2 Defects of forebrain induction 94

5.3.3 Neuronal migration disorders and sulcation defects 95

5.3.4 Disorders of proliferation or size 96

5.3.5 Encephaloclastic defects 97

5.3.6 Malformations in the caudal fossa and spinal cord 97

5.3.7 Congenital hydrocephalus and other anomalies of CSF pathways 100

Further reading 104

Neural tube closure defects 104

Defects of forebrain induction 104

Neuronal migration disorders and sulcation defects 104

Encephaloclastic defects 104

Cerebellar hypoplasia 104

Dandy Walker syndrome 104

Chiari malformation, Syringomyelia 104

Hydrocephalus 104

Arachnoidal and ependymal cysts 105

6 Metabolic–toxic diseases 106

6.1 General strategy for diagnosis of metabolic–toxic lesions 106

6.1.1 The major patterns 106

6.1.2 Further differential diagnosis 106

6.2 Encephalomalacias/myelomalacias 108

6.2.1 Polioencephalomalacia (PE) or cerebrocortical necrosis (CCN) 108

6.2.2 Polioencephalomalacia of subcortical structures and brainstem 114

6.2.3 Poliomyelomalacia 115

6.2.4 Leukoencephalomalacias 116

6.2.5 Encephalomalacias involving both gray and white matter 117

6.3 Acquired metabolic–toxic selective lesions 118

6.3.1 Neuronal degeneration 118

6.3.2 Axonal degeneration 121

6.3.3 Myelin degeneration 121

6.4 Spongy degeneration 122

6.5 Metabolic–toxic lesions of the peripheral nervous system (PNS) and skeletal muscle 124

6.5.1 Metabolic–toxic neuropathies 125

6.5.2 Metabolic–toxic myopathies 125

Further reading 126

General 126

Polioencephalomalacia large animals 126

Polioencephalomalacia in small animals 126

Hippocampal necrosis and sclerosis 126

Subcortical and brainstem encephalomalacias 126

Selenium poisoning 126

Equine leukomalacia 126

Enterotoxemia 126

CO poisoning 127

Metabolic toxic neuronal degenerations 127

Grass sickness 127

Acquired lysosomal storage diseases 127

Metabolic–toxic axonal degenerations 127

Irradiated feed-induced myelinopathy in cats 127

Toxic spongy degenerations 127

Hepatic encephalopathy 127

Toxic peripheral neuropathies 127

Metabolic peripheral neuropathies 128

Matabolic–toxic myopathies 128

7 Neoplasia 129

7.1 General strategy for diagnosis of neoplastic lesions 129

7.1.1 Clinic and diagnostic imaging 129

7.1.2 Interpretation of gross findings 129

7.1.3 Diagnosis 130

7.1.4 Grading 133

7.2 Tumors of neuroepithelial origin 133

7.2.1 Astrocytomas 133

7.2.2 Oligodendroglioma 137

7.2.3 Mixed gliomas (oligoastrocytomas) 139

7.2.4 Ependymoma 140

7.2.5 Choroid plexus tumors (papillomas and carcinomas) 142

7.2.6 Neuronal and mixed neuronal– glial tumors 143

7.2.7 Embryonal tumors 144

7.3 Tumors of cranial and spinal nerves 145

7.3.1 Benign PNST 145

7.3.2 Malignant peripheral nerve sheath tumors (MPNST) 147

7.4 Tumors of the meninges 147

7.4.1 Meningioma 147

7.4.2 Granular cell tumor 150

7.4.3 Mesenchymal tumors 151

7.5 Lymphomas and hematopoietic tumors 151

7.5.1 Primary T and B cell lymphomas 151

7.5.2 Intravascular lymphoma 151

7.5.3 Metastatic lymphoma 152

7.5.4 Primary CNS histiocytic sarcoma 152

7.6 Germ cell tumors 152

7.6.1 Germinoma 152

7.6.2 Teratoma 153

7.7 Embryonal tumors of nonneuroepithelial origin 153

7.7.1 Thoracolumbar spinal cord tumor (ectopic nephroblastoma) 153

7.8 Secondary or metastatic tumors 154

Further reading 155

General 155

Glial tumors 155

Choroid plexus tumors 155

Neuronal tumors 155

Embryonal tumors 155

PNS tumors 155

Meningiomas 155

Granular cell tumor 155

Mesenchymal tumors 155

Lymphomas and hemapoetic tumors 156

Germ cell tumors 156

Nephroblastoma 156

Metastatic tumors 156

8 Degenerative diseases 157

8.1 General strategy for differential diagnosis of degenerative lesions 157

8.1.1 Recognizing the major patterns 157

8.1.2 Further analysis 157

8.1.3 Diagnosis 159

8.2 Degeneration of neurons 159

8.2.1 General aspects 159

8.2.2 Motor neuron diseases 159

8.2.3 Cerebellar degenerations 162

8.2.4 Other neuronal degenerations 165

8.3 Axonal degenerations 166

8.3.1 Wallerian-like degenerative axonopathies 166

8.3.2 Axonopathies with prominent axonal swelling 171

8.4 Myelin disorders 173

8.4.1 Leukodystrophies 173

8.4.2 Myelin dysgenesis 177

8.5 Storage diseases 178

8.5.1 Lysosomal storage diseases 178

8.5.2 Neuronal ceroid lipofucsinoses (NCL) 181

8.5.3 Lafora’s disease 181

8.5.4 Acquired lysosomal storage diseases 182

8.6 Spongiform encephalopathies 182

8.6.1 Transmissible degenerative diseases 182

8.6.2 Neuropathology of TSE 183

8.6.3 TSEs in domestic animals 184

8.7 Spongy degenerations 185

8.7.1 Defi nition and general morphological features 185

8.7.2 Spongy degeneration in branchedchain organic acidurias 186

8.7.3 Spongy degenerations of other causes 187

8.8 Selective symmetrical encephalomalacias (SSE) 187

8.8.1 General morphological features 187

8.8.2 Mitochondrial encephalopathies in people and similar lesions in animals 187

8.9 Degenerative diseases of the peripheral nervous system and muscle 189

8.9.1 Degenerative polyneuropathies 189

8.9.2 Degenerative myopathies 189

Further reading 190

Motor neuron diseases 190

Cerebellar degenerations 190

Other neuronal degenerations 190

Alzheimer disease 190

Wallerian-like axonal degenerations 190

Degenerative myelopathy in old dogs 190

Wallerian-like degeneration in large animals 191

Neuroaxonal dystrophy 191

Leukodystrophies 191

Dysmyelination 191

Lysosomal storage diseases 191

Spongiform encephalopathies 191

Spongy degenerations 191

Selective symmetrical encephalomalacias 192

Degenerative diseases of the PNS and muscles 192

Index 193


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