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1.
Surg Neurol Int ; 14: 159, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37151464

RESUMO

Background: A special type of meningioma is known to have infiltrated inflammatory cells within the tumor, associated with peritumoral inflammation. However, there have been no reports of meningioma with inflammatory response only around the tumor, without inflammatory cells within the tumor itself. Case Description: A 70-year-old woman presented with transient right hemiparesis due to an extra-axial tumor on the left frontal convexity. The tumor appeared hypointense on T1-weighted magnetic resonance images and hyperintense on T2-weighted images without peritumoral edema, and was homogenously enhanced associated with the peritumoral leptomeningeal enhancement. Cerebrospinal fluid examination showed an increase in the number of inflammatory cells with a predominance of mononuclear cells. During the following 1 month, the tumor size was unchanged, but the peritumoral leptomeningeal enhancement was remarkably enlarged with uncontrolled focal seizures. The tumor was subtotally removed and semisolid substances in the subarachnoid space were biopsied. Pathological examination with immunostaining revealed angiomatous meningioma: the tumor had no inflammatory cell infiltration within it, but was associated with the infiltration of immunoglobulin G4-negative lymphocytes into the border zone between the tumor and the dura mater, as well as numerous neutrophils and fibrinous exudates in the peritumoral subarachnoid space. The tumor removal rapidly improved the leptomeningeal enhancement and inflammatory reactions. Conclusion: The authors reported the first case of angiomatous meningioma associated with massive peritumoral inflammation without inflammatory infiltrates within the tumor itself.

2.
NMC Case Rep J ; 10: 33-39, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36937499

RESUMO

Blood blister aneurysms (BBAs) or pseudoaneurysms (PAs) in the internal carotid artery (ICA) have fragile necks; therefore, conventional neck clipping is difficult. The standard treatment for BBAs or PAs is trapping with high or low flow bypass. However, there is no consensus on whether or not anterior clinoidectomy should be performed together. Two patients with ruptured ICA PA (anterior protrusion) or BBA (posterior protrusion) were presented to our hospital. Complete trapping was safely performed for both types of aneurysms via extradural anterior clinoidectomy and the extradural approach with dural incision. The advantages of the procedure are 1) safe proximal clipping, 2) early identification of the ICA C3 portion, 3) minimized frontal lobe retraction, 4) optic canal opening to allow mobility of the optic nerve, and 5) dural ring incision to allow mobility of the ICA.

3.
Surg Neurol Int ; 13: 479, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36324934

RESUMO

Background: Cardiocerebral infarction (CCI) is a rare entity that refers to the simultaneous occurrence of acute myocardial infarction and acute ischemic stroke. The management of CCI patients remains unclear. Case Description: An 86-year-old woman with a medical history of paroxysmal atrial fibrillation presented with a sudden onset of consciousness disturbance and right hemiplegia. Computed tomography of the head revealed no intracranial hemorrhage but the left hyperdense middle cerebral artery sign, associated with ST-segment elevation in II, III, and aVF noted on a routine 12-lead electrocardiogram at admission. The patient was immediately brought to the catheterization laboratory and percutaneous coronary intervention (PCI) was performed first, followed by mechanical thrombectomy, resulting in successful revascularization of the both diseases. Conclusion: Although the treatment strategy of CCI may depend on the condition of coronary and cerebral ischemia, it may be appropriate to prioritize coronary angiography and PCI if not acute ischemic stroke is critical.

4.
Surg Neurol Int ; 13: 355, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36128160

RESUMO

Background: The precise causes of traumatic acute interhemispheric subdural hematoma (AISDH) are unclear in most cases, and there are few cases, where the sources of bleeding are directly confirmed intraoperatively. We report a rare case of traumatic AISDH, in which a damaged dural branch of anterior cerebral artery (ACA) to the cerebral falx was identified as the cause of bleeding during hematoma removal. Case Description: A 61-year-old man with a history of craniotomy for the left putaminal hemorrhage at the age of 50 fell from a bed, bruised his head, and lost consciousness. Computed tomography of the head showed AISDH of 2.5cm in thickness, which was removed through a parietal parasagittal craniotomy under the microscope. Intraoperatively, the bleeding source was revealed to be a damaged dural branch from ACA to the cerebral falx. There was no rebleeding during his stay in our hospital. Conclusion: In this case, intraoperative findings revealed that the cause of bleeding was a damage to the dural branch of ACA. A vascular study is mandatory to rule out a vascular malformation in similar cases.

5.
Surg Neurol Int ; 12: 498, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34754548

RESUMO

BACKGROUND: The causes of angiogram-negative subarachnoid hemorrhage (SAH) on initial angiography, which accounts for 10-30% of spontaneous SAH, are heterogeneous and still unclear. We report a case of nonaneurysmal SAH, in which initial computed tomographic angiography (CTA) showed no source of bleeding, but the subsequent digital subtraction angiography (DSA) revealed contrast extravasation from the basilar artery without aneurysms. CASE DESCRIPTION: A 67-year-old woman with a medical history of hypertension presented as SAH of World Federation of Neurological Surgeons Grade II. CTA on admission did not show any cause of bleeding and DSA was subsequently performed to show contrast extravasation from a perforator of the middle third of the basilar artery without aneurysms during the subsequent DSA, resulting in profound deterioration SAH and neurological status. The patient was conservatively treated. Follow-up DSAs on days 2 and 16 showed no source of bleeding as well. CONCLUSION: Although the precise cause of bleeding in this case is uncertain, SAH might be caused by local dissection of the basilar artery perforator, and the bleeding site might heal spontaneously without forming of a pseudoaneurysm.

6.
Radiol Artif Intell ; 2(1): e190077, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33937812

RESUMO

PURPOSE: To construct a classification model of rupture status and to clarify the importance of morphologic variables and hemodynamic parameters on rupture status by applying a machine learning (ML) algorithm to morphologic and hemodynamic data of cerebral aneurysms. MATERIALS AND METHODS: Between 2011 and 2019, 226 (112 ruptured and 114 unruptured) cerebral aneurysms in 188 consecutive patients were retrospectively analyzed with computational fluid dynamics (CFD). A random forest ML algorithm was applied to the results to create three classification models consisting of only morphologic variables (model 1), only hemodynamic parameters (model 2), and both morphologic variables and hemodynamic parameters (model 3). The accuracy of rupture status classification and the importance of each variable or parameter in the models were computed. RESULTS: The accuracy was 77.0% in model 1, 71.2% in model 2, and 78.3% in model 3. The three most important features were projection ratio, size ratio, and aspect ratio in model 1; low shear area ratio, oscillatory shear index, and oscillatory velocity index in model 2; and projection ratio, irregular shape, and size ratio in model 3. CONCLUSION: Classification models of rupture status of cerebral aneurysms were constructed by applying an ML algorithm to morphologic variables and hemodynamic parameters. The model worked with relatively high accuracy, in which projection ratio, irregular shape, and size ratio were important for the discrimination of ruptured aneurysms.Supplemental material is available for this article.© RSNA, 2020.

7.
Cerebrovasc Dis Extra ; 8(1): 39-49, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29402828

RESUMO

BACKGROUND: Only few studies have investigated the relationship between the histopathology of retrieved thrombi and clinical outcomes. This study aimed to evaluate thrombus composition and its association with clinical, laboratory, and neurointerventional findings in patients treated by mechanical thrombectomy due to acute large vessel occlusion. METHODS: At our institution, 79 patients were treated by mechanical thrombectomy using a stent retriever and/or aspiration catheter between August 2015 and August 2016. The retrieved thrombi were quantitatively analyzed to quantify red blood cells, white blood cells, and fibrin by area. We divided the patients into two groups - a fibrin-rich group and an erythrocyte-rich group - based on the predominant composition in the thrombus. The groups were compared for imaging, clinical, and neurointerventional data. RESULTS: The retrieved thrombi from 43 patients with acute stroke from internal carotid artery, middle cerebral artery, or basilar artery occlusion were histologically analyzed. Erythrocyte-rich thrombi were present in 18 cases, while fibrin-rich thrombi were present in 25 cases. A cardioembolic etiology was significantly more prevalent among the patients with fibrin-rich thrombi than among those with erythrocyte-rich thrombi. Attenuation of thrombus density as shown on computed tomography images was greater in patients with erythrocyte-rich thrombi than in those with fibrin-rich thrombi. All other clinical and laboratory characteristics remained the same. Patients with erythrocyte-rich thrombi had a smaller number of recanalization maneuvers, shorter procedure times, a shorter time interval between arrival and recanalization, and a higher percentage of stent retrievers in the final recanalization procedure. The occluded vessels did not differ significantly. CONCLUSIONS: In this study, erythrocyte-rich thrombus was associated with noncardioembolic etiology, higher thrombus density, and reduced procedure time.


Assuntos
Isquemia Encefálica/patologia , Revascularização Cerebral/métodos , Eritrócitos/patologia , Trombólise Mecânica/instrumentação , Acidente Vascular Cerebral/patologia , Trombectomia/métodos , Trombose/sangue , Idoso , Idoso de 80 Anos ou mais , Isquemia Encefálica/epidemiologia , Isquemia Encefálica/etiologia , Isquemia Encefálica/cirurgia , Angiografia Cerebral/instrumentação , Procedimentos Endovasculares/métodos , Eritrócitos/citologia , Feminino , Fibrina/análise , Humanos , Contagem de Leucócitos , Masculino , Pessoa de Meia-Idade , Duração da Cirurgia , Ensaios Clínicos Controlados Aleatórios como Assunto , Stents/estatística & dados numéricos , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/etiologia , Acidente Vascular Cerebral/cirurgia , Trombose/patologia , Trombose/fisiopatologia , Tomografia Computadorizada por Raios X/métodos , Resultado do Tratamento
8.
J Stroke Cerebrovasc Dis ; 27(1): 83-91, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28888346

RESUMO

BACKGROUND: The efficacy of carotid artery stenting (CAS) for patients in the acute poststroke phase has not been established. We investigated the outcome of CAS for patients with symptomatic internal carotid artery (ICA) stenosis in the acute poststroke phase. METHODS: We performed a retrospective analysis of all patients who underwent CAS for symptomatic ICA stenosis in our institution. Patients in whom the time interval between neurological deterioration and the CAS procedure was less than 3 days were included in the early group, and the other patients were included in the delayed group. Perioperative complications including major adverse events (MAEs) were compared between the early and the delayed groups. RESULTS: One hundred five patients were included in the study. Forty patients were assigned to the early group and 65 patients were assigned to the delayed group. The overall MAE rate was 4.8%. There was no significant increase in the perioperative MAE in the early group compared with the delayed group (early group 2.5% versus delayed group 6.5%, P = .65). In the early group, 25 of 40 patients (62.5%) were functionally independent (modified Rankin scale [mRS] score of 0-2) at discharge. Significant differences between the independent patients and the disabled patients (mRS score of 3-6) included age (independent 72 versus disabled 79, P < .01) and prevalence of transient ischemic attack (36.0% versus .0%, P = .02). CONCLUSIONS: CAS performed within 3 days from the last ischemic event did not increase the risk of perioperative complication. Early CAS may be a useful option for the treatment of symptomatic carotid artery stenosis.


Assuntos
Artéria Carótida Interna , Estenose das Carótidas/terapia , Procedimentos Endovasculares/instrumentação , Stents , Acidente Vascular Cerebral/etiologia , Tempo para o Tratamento , Idoso , Idoso de 80 Anos ou mais , Artéria Carótida Interna/diagnóstico por imagem , Estenose das Carótidas/complicações , Estenose das Carótidas/diagnóstico por imagem , Avaliação da Deficiência , Procedimentos Endovasculares/efeitos adversos , Feminino , Humanos , Japão , Masculino , Estudos Retrospectivos , Fatores de Risco , Acidente Vascular Cerebral/diagnóstico , Fatores de Tempo , Resultado do Tratamento
9.
Clin Med Insights Case Rep ; 10: 1179547617731299, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28979174

RESUMO

Post-traumatic pituitary apoplexy is uncommon, most of which present with a sudden onset of severe headache and visual impairments associated with a dumbbell-shaped pituitary tumor. We experienced an unusual case of post-traumatic pituitary apoplexy with atypical clinical features. A 66-year-old man presented with mild cerebral contusion and an incidentally diagnosed intrasellar tumor after a fall accident with no loss of consciousness. The patients denied any symptoms before the accident. After 4 days, the left oculomotor nerve palsy developed and deteriorated associated with no severe headache. Repeated neuroimages suggested that pituitary apoplexy had occurred at admission and showed that the tumor compressed the left cavernous sinus. The patient underwent endonasal transsphenoidal surgery at 6 days after head injury, and the mass reduction improved the oculomotor nerve palsy completely within the following 14 days. The pathologic diagnosis was nonfunctioning pituitary adenoma with hemorrhage and necrosis.

10.
World Neurosurg ; 108: 595-602, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28927911

RESUMO

BACKGROUND: Blood blister-like aneurysms (BBAs) are a subgroup of aneurysms located on nonbranching sites of the internal carotid artery (ICA) and characterized by small size, a fragile wall, and a poorly defined broad-based neck. Both direct surgery and endovascular treatment for BBAs are often challenging. Some of the BBAs have been reported to look like true saccular aneurysms, and the misdiagnosis of BBA might result in catastrophic outcomes. The purpose of this study is to clarify the clinical and intraoperative findings of saccular BBAs. METHODS: We analyzed clinical and intraoperative findings in consecutive 11 patients with subarachnoid hemorrhage caused by ruptured BBA. BBAs were divided into typical BBAs, which were defined as typical tiny, broad-based, blister-like aneurysms, and saccular BBAs, which seemingly looked like true saccular aneurysms but were demonstrated to be BBAs by the intraoperative findings of the laceration of the ICA. The characteristics of saccular BBAs were analyzed. RESULTS: There were 4 patients with saccular BBAs in which the admission day was diverse from the onset day to several days after the onset. The origin of saccular BBAs was the medial (n = 2) or anterior (n = 2) walls of the ICA. Three of the 4 saccular BBAs pointed toward the optic nerve, whereas none of the typical BBAs pointed toward the optic nerve. CONCLUSIONS: Saccular BBAs may not merely develop secondarily from typical BBAs, but also form by the surrounding structures-dependent mechanisms when an aneurysm points toward the optic nerve. The findings in this study suggest that saccular-shaped aneurysms at nonbranching sites of the ICA toward the optic nerve should be considered as saccular BBAs.


Assuntos
Aneurisma Roto/patologia , Aneurisma Roto/cirurgia , Aneurisma Intracraniano/patologia , Aneurisma Intracraniano/cirurgia , Hemorragia Subaracnóidea/patologia , Hemorragia Subaracnóidea/cirurgia , Adulto , Idoso , Aneurisma Roto/complicações , Aneurisma Roto/diagnóstico por imagem , Angiografia Cerebral , Feminino , Humanos , Imageamento Tridimensional , Aneurisma Intracraniano/complicações , Aneurisma Intracraniano/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Nervo Óptico/diagnóstico por imagem , Nervo Óptico/patologia , Estudos Retrospectivos , Hemorragia Subaracnóidea/diagnóstico por imagem , Hemorragia Subaracnóidea/etiologia , Tomografia Computadorizada por Raios X
11.
World Neurosurg ; 98: 877.e13-877.e21, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27890763

RESUMO

BACKGROUND: Positional compression of the vertebral artery (VA) owing to cervical spondylosis is an uncommon cause of stroke. We report two cases of cervical spondylosis causing wake-up stroke, which is extremely rare. CASE DESCRIPTION: The first patient was a 78-year-old woman with vertigo and vomiting lasting from waking up. Magnetic resonance imaging (MRI) and angiography documented right cerebellar infarction, and stenosis of the right cervical VA. Dynamic angiography revealed that the right VA was occluded when her neck was extended or rotated to the right. Computed tomography (CT) angiography revealed the right VA compression by the right C5 superior articular process osteophytes. The second patient was a 77-year-old man with dysarthria from waking up. MRI and angiography revealed right cerebellar infarction associated with the right VA stenosis and the left VA occlusion at C5-C6, whose cause was diagnosed as compression caused by bilateral uncovertebral osteophytes on CT angiography. Dynamic angiography showed that neck rotation to the right aggravated the right VA stenosis while recanalizing the left VA. Both patients were treated with a free radical scavenger (edaravone) and heparin, and underwent surgical decompression of VAs 14 or 18 days after onset. No recurrent ischemic events occurred thereafter. CONCLUSIONS: Magnetic resonance angiography of extracranial cervical VAs may be useful as an initial screening test for VA compression secondary to cervical spondylosis as a rare cause of wake-up stroke, especially in cases of cerebral infarction in the posterior circulation with no evidences of causative arrhythmia and intracranial lesions.


Assuntos
Descompressão Cirúrgica/métodos , Espondilose/complicações , Espondilose/etiologia , Acidente Vascular Cerebral/complicações , Insuficiência Vertebrobasilar , Idoso , Angiografia Cerebral , Angiografia por Tomografia Computadorizada , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Gravidez , Espondilose/diagnóstico por imagem , Insuficiência Vertebrobasilar/diagnóstico por imagem , Insuficiência Vertebrobasilar/etiologia , Insuficiência Vertebrobasilar/cirurgia
12.
No Shinkei Geka ; 36(8): 725-30, 2008 Aug.
Artigo em Japonês | MEDLINE | ID: mdl-18700536

RESUMO

We report a rare case of repeated vertebral artery (VA) occlusion. The VA occlusion was due to a distal embolism originating from traumatic VA dissection resulting from mechanical compression due to excessive bone formation of the superior facet of C6. A 39-year-old male suffered from two embolic events in the right VA with a 4-month intervals. Three-dimensional computed tomography (3D-CT) revealed abnormal bone of the superior facet at the level of C6 and the verterbral artery compression. Angiography demonstrated the irregularity and the late clearance of the contrast material at the stenosis of VA, which was diagnosed as the dissection. Dynamic angiography showed right VA occlusion when rotating the patients head to the left and extending it backwards. External orthosis using a cervical collar for 1 month was undertaken, but the dissection remained, so coil embolization of the right VA was performed using an intravascular procedure. Because of the age of the patient, location, radiological features and clinical course, the authors considered the excessive bone formation was a bone anomaly rather than a cervical spondylotic change.


Assuntos
Arteriopatias Oclusivas/etiologia , Vértebras Cervicais/anormalidades , Dissecação da Artéria Vertebral/etiologia , Artéria Vertebral , Adulto , Arteriopatias Oclusivas/diagnóstico , Arteriopatias Oclusivas/terapia , Embolização Terapêutica , Humanos , Imageamento Tridimensional , Imageamento por Ressonância Magnética , Masculino , Aparelhos Ortopédicos , Recidiva , Tomografia Computadorizada por Raios X , Artéria Vertebral/diagnóstico por imagem , Dissecação da Artéria Vertebral/diagnóstico , Dissecação da Artéria Vertebral/terapia
13.
Neurol Res ; 29(1): 58-63, 2007 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17427277

RESUMO

OBJECTIVES: The goal of this study was to evaluate the usefulness of a recently developed image fusion of three-dimensional digital subtraction angiography (3D DSA) and magnetic resonance (MR) images, DSA-MR fusion, in the pre-treatment assessment of cerebral aneurysm. METHODS: Eighteen patients with 21 unruptured anterior or posterior circulation aneurysms underwent pre-treatment DSA-MR fusion. The authors independently assessed whether DSA-MR fusion images provided any useful additional information compared with analysing 3D DSA and MR images separately, and if this had an impact on the therapeutic decision-making of unruptured aneurysms. RESULTS: DSA-MR fusion images were obtained within 30 minutes for all patients. In 19 of 21 aneurysms, it provided the following additional information to the findings of 3D DSA, MR images or both: the passing course in the brain tissues of perforating arteries near or originating from an aneurysm, and/or the spatial relationship between an aneurysm and an oculomotor nerve. This information from DSA-MR fusion images was useful for diagnosis, therapeutic decision-making and the risk assessment associated with the treatment, as well as patient education regarding cerebral aneurysm. DISCUSSION: DSA-MR fusion images were useful for the pre-treatment evaluation of unruptured cerebral aneurysms as a supplement to DSA and MR images.


Assuntos
Angiografia Digital/métodos , Artérias Cerebrais/diagnóstico por imagem , Artérias Cerebrais/patologia , Aneurisma Intracraniano/diagnóstico por imagem , Aneurisma Intracraniano/patologia , Imageamento por Ressonância Magnética/métodos , Adulto , Idoso , Encéfalo/irrigação sanguínea , Encéfalo/patologia , Encéfalo/fisiopatologia , Artérias Cerebrais/fisiopatologia , Diagnóstico Diferencial , Feminino , Humanos , Processamento de Imagem Assistida por Computador/métodos , Aneurisma Intracraniano/fisiopatologia , Masculino , Pessoa de Meia-Idade , Doenças do Nervo Oculomotor/diagnóstico , Doenças do Nervo Oculomotor/etiologia , Doenças do Nervo Oculomotor/fisiopatologia , Valor Preditivo dos Testes , Cuidados Pré-Operatórios/métodos , Medição de Risco
14.
J Neurooncol ; 84(2): 185-8, 2007 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-17332944

RESUMO

Lhermitte-Duclos Disease (LDD) is a rare cerebellar lesion that has long been controversial as to whether the entity is a hamartoma, a malformation, or a neoplasm. Recent advances in metabolic imaging and molecular biology have unveiled biological features of LDD and a close relationship between LDD and Cowden disease. Adult onset LDD is now considered identical to Cowden disease in a US guideline. We present a case of LDD, in which high fluorodeoxy glucose (FDG) uptake was shown on PET/CT. We performed dual time point scans, in which a delayed scan exhibited more intense FDG uptake by the hamartomatous lesion than an early scan. We must remain aware of the possibility of LDD when intense accumulation is observed in a cerebellar lesion on FDG-PET/CT imaging.


Assuntos
Cerebelo/diagnóstico por imagem , Fluordesoxiglucose F18 , Síndrome do Hamartoma Múltiplo/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Compostos Radiofarmacêuticos , Adenoma/complicações , Idoso , Cerebelo/patologia , Síndrome do Hamartoma Múltiplo/complicações , Síndrome do Hamartoma Múltiplo/patologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Neoplasias da Glândula Tireoide/complicações , Tomografia Computadorizada por Raios X
15.
Neurosurgery ; 56(2): 335-42; discussion 335-42, 2005 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-15670381

RESUMO

OBJECTIVE: Magnetic resonance (MR) images most clearly visualize intracranial tissues but have some limitations in terms of detailed analysis of the intracisternal vasculature. To compensate for these shortcomings, an image fusion of three-dimensional digital subtraction angiography (DSA) and MR images, DSA-MR fusion, has been developed. The goal of this study was to evaluate the usefulness of DSA-MR fusion for the visualization of the intracisternal arteries and veins at the posterior fossa. METHODS: Ten consecutive patients (five with neurovascular compression syndrome and five with brain tumors) underwent preoperative DSA-MR fusion. The DSA-MR fusion images were compared with intraoperative findings. RESULTS: Image fusion was performed within 20 minutes, and the registration error was insignificant in all cases. Image fusion successfully visualized the clear three-dimensional relationships among the intracisternal arteries and veins, cranial nerves, brain tissues, and a lesion, and a specific vessel was easily identified. The findings of the DSA-MR fusion images were surgically confirmed in all patients. CONCLUSION: Using this advanced image fusion technique coupled with its reasonable postprocessing time, neurosurgeons may more easily and precisely understand the surgical anatomy before surgery than analyzing three-dimensional DSA and MR images separately.


Assuntos
Angiografia Digital , Cisterna Magna/irrigação sanguínea , Cisterna Magna/patologia , Imageamento por Ressonância Magnética , Adolescente , Adulto , Idoso , Neoplasias Encefálicas/patologia , Criança , Fossa Craniana Posterior , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Síndromes de Compressão Nervosa/patologia
16.
AJNR Am J Neuroradiol ; 24(10): 2011-4, 2003.
Artigo em Inglês | MEDLINE | ID: mdl-14625225

RESUMO

We report a novel technique that fuses 3D digital subtraction angiograms and MR images. Image fusion was successfully performed within 20 minutes each in 11 consecutive cases. Our initial experience showed that this image fusion enabled clear and simultaneous visualization of perforating arteries and surrounding tissues. The relation between perforating arteries and normal brain or lesions was easily understood in a clinical setting by using this image fusion.


Assuntos
Angiografia Digital , Encefalopatias/diagnóstico , Processamento de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Adulto , Idoso , Neoplasias Encefálicas/diagnóstico , Feminino , Humanos , Aneurisma Intracraniano/diagnóstico , Malformações Arteriovenosas Intracranianas/diagnóstico , Masculino , Pessoa de Meia-Idade , Fatores de Tempo
17.
No Shinkei Geka ; 30(5): 479-85, 2002 May.
Artigo em Japonês | MEDLINE | ID: mdl-11993170

RESUMO

It is generally agreed that the autogenous bone flap which has been removed at the time of external decompression would be superior to any artificial material if it can be used in cranioplasty. Cranioplasty using autogenous frozen bone graft has been reported and showed good results except for infection and severe bone absorption. We conducted 39 cases of cranioplasty with cryopreserved autogenous bone in the presence of 10% of Dimethylsulfoxide (DMSO), which has been reported as a cryoprotective agent. Although no remarkable histological effects have been recognized in frozen bone with or without DMSO, we have obtained excellent clinical results without bone absorption in 24 of the cases. These results suggest that DMSO is helpful for frozen bone preservation.


Assuntos
Transplante Ósseo , Osso e Ossos , Criopreservação/métodos , Dimetil Sulfóxido , Procedimentos de Cirurgia Plástica/métodos , Crânio/cirurgia , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Transplante Autólogo
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