This case study describes the magnetic resonance characteristics of brain infarction in three dogs. Locations of the brain infarcts were cerebella, thalamus, and multifocal. The infarcts were sharply demarcated from adjacent brain parenchyma, homogeneous, T1-hypointense, T2-hyperintense with/without...
This case study describes the magnetic resonance characteristics of brain infarction in three dogs. Locations of the brain infarcts were cerebella, thalamus, and multifocal. The infarcts were sharply demarcated from adjacent brain parenchyma, homogeneous, T1-hypointense, T2-hyperintense with/without contrast enhancement, and minimal or no mass effect. Diffusion-weighted imaging (DWI) sequences were available in a dog and the infarcts were hyperintense on DWI and were hypointense on the apparent diffusion coefficient map.
This case study describes the magnetic resonance characteristics of brain infarction in three dogs. Locations of the brain infarcts were cerebella, thalamus, and multifocal. The infarcts were sharply demarcated from adjacent brain parenchyma, homogeneous, T1-hypointense, T2-hyperintense with/without contrast enhancement, and minimal or no mass effect. Diffusion-weighted imaging (DWI) sequences were available in a dog and the infarcts were hyperintense on DWI and were hypointense on the apparent diffusion coefficient map.
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가설 설정
Infarction location, type, and vascular territory involved are summarized in Table 2. All infarcts were territorial. Location of the brain infarcts was cerebella (3 dogs), thalamus (1 dog, Fig 1), and multifocal (1 dog, Fig 2).
The infarcts were sharply demarcated from adjacent brain parenchyma, homogeneous, hypointense on T1WI, hyperintense on T2WI, and minimal or no mass effect in all of three dogs. Contrast study was performed in Dog 1 and Dog 3. The lesion did not enhance after contrast material administration in Dog 1. However, postcontrast T1WI revealed scant uptake with contrast mainly the periphery of the lesion in Dog 3 (Fig 3).
제안 방법
The characteristics of ischemic infarction is hyperintense on DWI and low intensity on ADC maps, as observed in Dog 3 with presumptive infarction that were imaged within 3 days of the onset of clinical signs in this study.
대상 데이터
Signalment, clinical signs, and prognosis are summarized in Table 1. Breeds identified included two pure breeds (one each of Maltese and Pomeranian) and one mixed breed dog. The dogs ranged in age from 9 to 13 years.
All of three dogs were spayed female. The presenting complaints included acute onset of seizure (Dog 1 and Dog 3), ataxia (Dog 3), nystagmus (Dog 1), spasticity of the forelimbs (Dog 2), and cervical tonic extension (Dog 2).
This report describes the MRI characteristics suspected ischemic brain infarction in three dogs.
Three dogs with diagnosed brain infarction by conventional and functional MRI were included in this study. Signalment, clinical signs, and prognosis are summarized in Table 1.
성능/효과
Location of the brain infarcts was cerebella (3 dogs), thalamus (1 dog, Fig 1), and multifocal (1 dog, Fig 2). The MRI findings are summarized in Table 3. The infarcts were sharply demarcated from adjacent brain parenchyma, homogeneous, hypointense on T1WI, hyperintense on T2WI, and minimal or no mass effect in all of three dogs. Contrast study was performed in Dog 1 and Dog 3.
5T (Magnetom Essenza, Siemens, Germany). Transeverse, sagittal, and dorsal plane images and a minimum of T2-weighted (T2WI) and non-contrast T1-weighted images (T1WI) and fluid-attenuated inversion recovery (FLAIR) were obtained. In addition, images obtained by means of post-contrast (IV injection of 0.
후속연구
In the present study, however, there were two lesions in the right cerebellar hemisphere or paravermis and only one in the left side. Further studies are needed to determine the affected side in patients with cerebellar infarction.
참고문헌 (12)
Adams RD. Victor M. Cerebrovascular diseases. In: Principles of neurology, 6th ed. New York: McGraw-Hill Inc. 1996: 777-873.
Berg JM, Joseph RJ. Cerebellar infarcts in two dogs diagnosed with magnetic resonance imaging. J Am Anim Hosp Assoc 2003; 39: 203-207.
Garosi L, McConnell JE, Platt SR, Barone G, Baron JC, de Lahunta A, Schatzberg SJ. Results of diagnostic investigations and long-term outcome of 33 dogs with brain infarction (2000-2004). J Vet Intern Med 2005; 19: 725-731.
Garosi L, McConnell JE, Platt SR, Barone G, Baron JC, de Lahunta A, Schatzberg SJ. Clinical and topographic magnetic resonance characteristics of suspected brain infarction in 40 dogs. J Vet Intern Med 2006; 20: 311-321.
Kalimo H, Kaste M, Haltia M. Vascular disease. In: Graham DI, Lantos PL, eds. Greenfield's Neuropathology, 7th ed. London: Arnold; 2002: 233-280.
Major AC, Caine A, Rodriguez SB, Cherubini GB. Imaging diagnosis- Magnetic resonance imaging in a dog with sequential brain infarction. Vet Radiol Ultrasound 2012; 53: 576-580.
Marks MP. Cerebral ischemia and infarction. In: Atlas SW (ed): Magnetic resonance imaging of the brain and spine. Philadelphia: Lippincott Williams & Wilkins, 2002; 919-980.
McConnell JF, Garosi L, Platt SR. Magnetic resonance imaging findings of presumed cerebellar cerebrovascular accident in twelve dogs. Vet Radiol Ultrasound 2005; 46: 1-10.
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