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1.
SHINJI TAMURA YUMIKO TAMURA TAKESHI TSUKA KAZUYUKI UCHIDA 《Veterinary radiology & ultrasound》2006,47(2):142-144
An 8-year-old Yorkshire terrier developed acute onset coma and seizure after cranial trauma. Intracranial hemorrhage was suspected from the clinical signs and history. Low-field magnetic resonance (MR) imaging revealed a round mass within the right cerebral hemisphere, compressing the right lateral ventricle and displacing the longitudinal fissure to the left. The lesion was hypointense on T1-weighted images and hyperintense on T2-weighted images, consistent with an acute hemorrhage. MR imaging was performed every 24 h for 6 days from 1 h after the injury, and then on day 14 of hospitalization. With time, the signal intensity changed to hyperintense on Ti-weighted images. On T2-weighted images the center of the mass changed to hypointense, and then to hyperintense with a hypointense rim. These changes of signal intensity were related to hemoglobin oxidation. 相似文献
2.
Julien Bazelle Abby Caine Viktor Palus Brian A. Summers Giunio B. Cherubini 《Veterinary radiology & ultrasound》2015,56(2):196-203
Intracranial arachnoid diverticula (cysts) are rare accumulations of cerebrospinal fluid (CSF) within the arachnoid membrane. The purpose of this retrospective study was to describe magnetic resonance imaging (MRI) characteristics of fourth ventricle arachnoid diverticula in a group of dogs. The hospital's medical records were searched for dogs with MRI studies of the brain and a diagnosis of fourth ventricle arachnoid diverticulum. Clinical characteristics were recorded from medical records and MRI studies were reinterpreted by a board‐certified veterinary radiologist. Five pediatric dogs fulfilled inclusion criteria. Clinical signs included cervical hyperaesthesia, obtundation, tetraparesis, and/or central vestibular syndrome. In all five dogs, MRI findings were consistent with obstructive hydrocephalus, based on dilation of all ventricles and compression of the cerebellum and brainstem. All five dogs also had cervical syringohydromyelia, with T2‐weighted hyperintensity of the gray matter of the cord adjacent to the syringohydromyelia. A signal void, interpreted as flow disturbance, was observed at the mesencephalic aqueduct in all dogs. Four dogs underwent surgical treatment with occipitalectomy and durotomy. A cystic lesion emerging from the fourth ventricle was detected in all four dogs during surgery and histopathology confirmed the diagnosis of arachnoid diverticula. Three dogs made excellent recovery but deteriorated shortly after surgery and were euthanized. Repeat MRI in two dogs revealed improved hydrocephalus but worsening of the syringohydromyelia. Findings from the current study supported theories that fourth ventricle arachnoid diverticula are secondary to partial obstruction of the central canal or lateral apertures and that arachnoid diverticula are developmental lesions in dogs. 相似文献
3.
Clifford R. Berry DVM Kathy N. Wright DVM Edward B. Breitschwerdt DVM Jerome M. Feldman MD 《Veterinary radiology & ultrasound》1993,34(1):52-55
A 13-year-old neutered female Yorkshire terrier presented with a history of progressive episodic weakness and disorientation of 4 months duration. Physical and neurologic examinations were normal at presentation. Abdominal ultrasound revealed a mass involving the right adrenal gland. Standard planar scintigraphy was performed at 4, 18, and 24 hours after intravenous injection 185 MBq (5mCi) of 123 I-labeled metaiodobenzylguanidine (123 I-MIBG). An area of focal intense uptake was identified in the area of the right adrenal gland. A pheochromocytoma was confirmed histologically after surgical excision. 相似文献
4.
IMAGING DIAGNOSIS—MAGNETIC RESONANCE IMAGING OF DIFFUSE LEPTOMENINGEAL OLIGODENDROGLIOMATOSIS IN A DOG WITH “DURAL TAIL SIGN” 
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下载免费PDF全文 Monika Anna Lobacz Fabienne Serra Gawain Hammond Anna Oevermann Allison C. Haley 《Veterinary radiology & ultrasound》2018,59(1):E1-E6
A case of diffuse leptomeningeal oligodendrogliomatosis affecting the brain and spinal cord of a dog is presented. A 7.5‐year old, male neutered Staffordshire bull terrier presented for evaluation of a chronic history of tetraparesis and seizures, with a multifocal neuroanatomical localization was determined. Extra‐axial intradural lesions with an atypical presentation of a dural tail sign were seen on MRI. Histologically, the lesions were consistent with leptomeningeal oligodendrogliomatosis. To the authors’ knowledge, a dural tail sign has not previously been reported as an MRI characteristic of diffuse leptomeningeal oligodendrogliomatosis in dogs. 相似文献
5.
Crosara S Zabarino S Morello E Iussich S Buracco P Borgarelli M 《The Journal of small animal practice》2008,49(2):100-102
A 12-year-old, male Yorkshire terrier was presented for acute pulmonary oedema. Thoracic radiographs showed a linear metallic foreign body within the cardiac silhouette. Echocardiogram showed a hyperechoic line extending through the left ventricle, the mitral valve, leading into the left atrium. A 4 cm long Kirschner wire was surgically removed by left fourth thoracotomy. The dog died two days after surgery for acute pulmonary oedema. Necropsy showed thrombi on the mitral leaflets that impeded their movement. 相似文献
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Gabriela Seiler Dr. Med. Vet. Sigitas Cizinauskas Dr. Med. Vet. Jürg Scheidegger Dr. Med. FMH Johann Lang Dr. Med. Vet. 《Veterinary radiology & ultrasound》2001,42(5):417-422
Magnetic resonance imaging was performed on an eight-year-old, neutered female German Shepherd dog with a history of acute depression, inappetence, and hyperthermia. A lesion in the cerebrum was suspected. Possible differential diagnoses were meningoencephalitis, neoplasia, and vascular lesion (infarction, bleeding). A ring enhancing lesion was found in the basal ganglia on the left side with edema of the surrounding brain tissue. A similar mass lesion was present in the right pterygoid musculature. With inversion recovery sequences an altered composition of the cerebrospinal fluid (CSF) in the left lateral ventricle could be detected. CSF analysis confirmed a pyocephalus, probably due to rupture of a brain abscess into the left lateral ventricle. 相似文献
8.
BL Plattner M Kent B Summers SR Platt AC Freeman U Blas-Machado J Clemans NF Cheville D Garcia-Tapia 《Journal of the American Animal Hospital Association》2012,48(5):359-365
A 3.5 yr old Saint Bernard was evaluated for nonambulatory tetraparesis and cranial nerve dysfunction, and a 7 yr old rottweiler was evaluated for progressive paraparesis. Clinical signs of left-sided vestibular and general proprioceptive ataxia and cranial nerve VII dysfunction in the Saint Bernard suggested a lesion affecting the brain stem. Signs in the rottweiler consisted of general proprioceptive/upper motor neuron paraparesis, suggesting a lesion involving the third thoracic (T3) to third lumbar (L3) spinal cord segments. MRI was normal in the Saint Bernard, but an intra-axial lesion involving the T13-L2 spinal cord segments was observed in the rottweiler. In both dogs, the central nervous system (CNS) contained neoplastic cells with features consistent with gliomatosis cerebri (GC). In the Saint Bernard, neoplastic cells were present in the medulla oblongata and cranial cervical spinal cord. In the rottweiler, neoplastic cells were only present in the spinal cord. Immunohistochemistry disclosed two distinct patterns of CD18, nestin, and vimentin staining. GC is a rarely reported tumor of the CNS. Although GC typically involves the cerebrum, clinical signs in these two dogs reflected caudal brainstem and spinal cord involvement. 相似文献
9.
William B. Thomas DVM MS Gregory B. Daniel DVM MS M. Donald McGavin MVSc PhD 《Veterinary radiology & ultrasound》1997,38(2):120-123
A 12-year-old Maltese terrier was evaluated for progressive tetraparesis and neck pain. On radiographs, there was a periosteal reaction involving the fourth cervical vertebra. Myelographically, there was extradural compression of the spinal cord associated with the lesion. The dog was euthanized and necropsied. Histopathologic diagnosis was parosteal osteosarcoma of the vertebra. 相似文献
10.
Julie Kornder Simon R. Platt Joe Eagleson Marc Kent Shannon P. Holmes 《Veterinary radiology & ultrasound》2016,57(4):E42-E45
A 9‐year‐old spayed female Scottish terrier presented with an 8‐day history of progressive paraparesis. Neurological examination suggested a painful T3‐L3 myelopathy. Multifocal uniform contrast‐enhancing masses involving the vertebral bodies, pedicles, laminae, and spinous processes of two vertebrae and compressing the spinal cord were present on MRI. Fluoroscopic‐guided fine needle aspiration of one of the vertebral lesions revealed a predominantly lymphoblastic population of cells compatible with a diagnosis of lymphoma. To the authors’ knowledge, this represents the first published case of canine lymphoma with vertebral involvement, characterized with MRI. 相似文献
11.
A 3-year-old, intact female ferret (Mustela putorius furo) was presented with right head tilt and circling. The animal was diagnosed with a chronic otitis media-interna by computed tomography (CT) and a myringotomy was performed. One week later the animal was clinically recovered. Thirteen days after the otitis diagnosis, the ferret was presented with hemiparesis of the hind limbs. Thoracic and lumbar radiographs showed mild congenital alterations in the vertebras and the myelography test revealed spinal cord dilation at the level of L3-L4. The CT and the MRI revealed an intraspinal lesion at the level of L2-L4. The animal was diagnosed with an intramedullary vascular lesion, and was treated with intravenous fluid therapy, meloxicam, marbofloxacin, amoxicillin/clavulanic acid, and gabapentin. Nest rest was recommended. The coagulation tests were within normal limits. Four months after de intramedullary lesion diagnosis, the animal was presented with apathy, depression and anorexia. Unfortunately, the ferret died at the same day. Post-mortem evaluation of morphology and immunophenotype of lesions resulted in the diagnosis of a multifocal embryonal tumor (ET) in the brain and spinal cord of a ferret. 相似文献
12.
A 5-year-old, 1.36-kg, neutered male Yorkshire terrier was referred for evaluation of a persistent right aortic arch with concurrent megaesophagus. The dog was 3 months old when clinical signs were first noted, 2 years of age when diagnosed with megaesophagus, and 4 years of age when diagnosed with vascular ring anomaly (VRA). Surgical correction of the VRA was performed when the dog was 5 years of age, after gastrostomy tube feeding for 1 year to maintain nutritional requirements and mitigate the degree and duration of the esophageal distention. Thirteen months after surgery, the dog was eating soft dog food with no vomiting or regurgitation. 相似文献
13.
Donatella Lotti DVM PhD Maria Tresa Capucchio DVM Elena Gaidolfi DM Monica Merlo DVM 《Veterinary radiology & ultrasound》1999,40(6):622-626
A 5-year-old, male Yorkshire Terrier had chronic and progressive neurologic signs compatible with lesions in the right brain stem and right forebrain. In magnetic resonance images of the brain there were multifocal lesions at different stages of evolution, consistent with an inflammatory disease. The lesions were located in the white matter of the cerebrum, in the diencephalon and mesencephalon. These lesions were hypointense in T1-weighted images and hyperintense in T2-weighted images with no mass effect and minimal enhancement with gadolinium. Necrotizing encephalitis was confirmed post mortem. 相似文献
14.
Thibaud JL Hidalgo A Benchekroun G Fanchon L Crespeau F Delisle F Blot S 《Journal of the American Animal Hospital Association》2008,44(5):266-275
A 4-year-old, male Jack Russell terrier was presented for a 6-month history of progressive right hemiparesis with episodic cervical hyperesthesia. The neurological examination showed a right-sided, upper motoneuron syndrome and partial Horner's syndrome. Two magnetic resonance imaging (MRI) examinations were performed 3 months apart and revealed a persistent cervical intramedullary hematoma. A dorsal myelotomy was performed. A subacute hematoma was confirmed histologically without underlying lesions. Eighteen months later, the dog's clinical signs were minimal. Two MRI examinations were performed 2 weeks and 5 months after surgery and revealed regressing signal abnormalities at the surgical site, consistent with a surgical scar. 相似文献
15.
为探讨铜缺乏对奶牛大脑、小脑及脊髓乙酰胆碱酯酶（ACHEase)组化特征（分布特点及活性）的影响，本实验选择铜缺乏症高发区自然发病的奶犊牛6头，剖杀后采集大脑、小脑、脊髓作冰冻切片及酶组化染色，以6头同年生健康奶犊牛为对照。实验结果表明，发病奶牛大脑、小脑及脊髓中ACHEase计数值均显著低于对照组奶牛（P＜0．05）；除大脑外，铜缺额奶牛脊髓上小脑中ACHEase的扫描值也显著低于对照组（P＜0．05）；发病奶牛脊髓小脑中ACHEase的扫描值也低于对照组（P＜0．05）；发病奶牛组织中ACHEase酶颗粒的分布也发生特征性的变化。结论：神经递质酶活性的改变是导致奶牛铜缺乏症病理过程的重要原因。 相似文献
16.
Lee KI Lim CY Kang BT Park HM 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2011,73(10):1385-1388
A 7-year-old castrated male mixed-breed dog was presented with a complaint of acute pain. The dog had suffered from isolated seizures for two years. Magnetic resonance imaging (MRI) of the brain revealed a smooth brain surface due to lack of gyri and sulci formation of the cerebrum and thick cortical grey matter. Additionally, ventriculomegaly and an arachnoid cyst were noted. Multiple spinal cord compressions induced by intervertebral disc protrusion were observed on a cervical MRI. Based on these findings, the dog was diagnosed as having lissencephaly concurrent with intervertebral cervical disease. After therapy for seizure and cervical pain, the clinical signs were completely resolved. To the author's knowledge, this is the case report to diagnose lissencephaly in a mixed-breed dog. 相似文献
17.
Tobias KM 《Journal of the American Animal Hospital Association》2003,39(4):385-389
A hereditary basis for congenital portosystemic shunts (PSS) in Yorkshire terriers was explored through record and pedigree analysis and a breeding trial. The odds ratio for PSS in Yorkshire terriers was 35.9 times greater than for all other breeds combined. Wright's coefficient of inbreeding was approximately twice as high for Yorkshire terriers with PSS as compared to normal members of the breed (P=0.09). No common ancestors were found that were significant to the PSS group. Two affected Yorkshire terriers were bred and produced two normal puppies. Congenital PSS appears to be hereditary in Yorkshire terriers; however, the mechanism of inheritance has yet to be elucidated. 相似文献
18.
An unusual case of a Yorkshire terrier with a dermoid sinus associated with multiple spinal/costal malformations is described. The dog presented with ataxia and pain in the dorsal thoracic region. Diagnostic characterisation of the lesions was obtained with radiography, myelography and computed tomography. After surgical removal of the sinus, the dog showed marked clinical improvement over a two-year period. 相似文献
19.
Evaluation of osseous‐associated cervical spondylomyelopathy in dogs using kinematic magnetic resonance imaging 下载免费PDF全文
下载免费PDF全文 Michele Provencher Amy Habing Sarah A. Moore Laurie Cook Gary Phillips Ronaldo C. da Costa 《Veterinary radiology & ultrasound》2017,58(4):411-421
Osseous‐associated cervical spondylomyelopathy in dogs is characterized by both static and dynamic spinal cord compression; however, standard MRI methods only assess static compression. In humans with cervical spondylotic myelopathy, kinematic MRI is commonly used to diagnose dynamic spinal cord compressions. The purpose of this prospective, analytical study was to evaluate kinematic MRI as a method for characterizing the dynamic component of osseous‐associated cervical spondylomyelopathy in dogs. We hypothesized that kinematic MRI would allow visualization of spinal cord compressions that were not identified with standard imaging. Twelve client‐owned dogs with osseous‐associated cervical spondylomyelopathy were enrolled. After standard MRI confirmed a diagnosis of osseous‐associated cervical spondylomyelopathy, a positioning device was used to perform additional MRI sequences with the cervical vertebral column flexed and extended. Morphologic and morphometric (spinal cord height, intervertebral disc width, spinal cord width, vertebral canal height, and spinal cord area) assessments were recorded for images acquired with neutral, flexion, and extension imaging. A total of 25 compressions were seen with neutral positioning, while extension identified 32 compressions. There was a significant association between extension positioning and presence of a compressive lesion at C4‐C5 (p = 0.02). Extension was also associated with a change in the most severe site of compression in four out of 12 (33%) dogs. None of the patients deteriorated neurologically after kinematic imaging. We concluded that kinematic MRI is a feasible method for evaluating dogs with osseous‐associated cervical spondylomyelopathy, and can reveal new compressions not seen with neutral positioning. 相似文献
20.
An 8·5-year-old, female, neutered, Rottweiler was presented for investigation of progressive ataxia of one week duration. Proprioception was absent in the left pelvic limb and reduced on the right, thoracolumbar hyperalgesia was evident and pelvic limb segmental spinal reflexes were normal. Magnetic resonance imaging (MRI) demonstrated a spherical region of signal void compressing the spinal cord between the fifth and sixth thoracic vertebrae and several non-compressive degenerate intervertebral discs. Computed tomography (CT) of the region confirmed the findings and identified the lesion as gas. A dorsolateral hemilaminectomy was performed to decompress the spinal cord and achieved complete resolution of the clinical signs on examination after 3 months. This is the first known reported case of spontaneous pneumorrhachis in a veterinary patient. 相似文献