Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P50583 (asymmetrical)
 12,197 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The diagnosis of glioma of the chiasm is based on the following factors: occurrence in infancy, association with Von Recklinghausen's disease, progressive and slow loss of vision in both eyes, bilateral optic atrophy, unilateral temporal defect or asymmetrical bitemporal hemianopia, exophthalmos, slow course, omega-deformation of the sella turcica, enlargement of one or both optic foramina, postitive computerized axial tomography. Surgery is contraindicated. Radiotherapy may be applied, but its efficacy is still discussed.
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PMID:[Glioma of the chiasm (author's transl)]. 14 9

Brainstem acoustic evoked potentials (BAEPs) were measured in 14 children with different type of posterior fossa tumours several times during the clinical course, in order to assess the value of this simple and non-invasive method in the diagnosis and follow-up of posterior fossa tumours in childhood. Eight children had midline medulloblastoma, three children had lateral astrocytoma, three had intrinsic brainstem glioma. Different BAEP patterns could be detected in different tumour's type: bilateral symmetrical or slightly asymmetrical I-V. IPL prolongation in midline medulloblastomas, unilateral or markedly asymmetrical I.-V. IPL prolongation or wave V. depression on the contralateral side in lateral astrocytomas, and severely distorted asymmetrical waveform in intrinsic brainstem gliomas. The BAEPs were abnormal earlier than CT scan in a case of craniospinal astrocytoma. BAEPs were useful in the follow-up: the effect of the preoperative chemotherapy or the progression of the inoperable tumours could be as well documented by this method, as by the CT scan. BAEPs proved effective in the assessment of postoperative neurological complications: bilateral symmetrical IPL prolongation and wave V. depression with clinical signs of increased intracranial pressure occurred in a case of postoperative occlusive hydrocephalus, unilateral IPL prolongation occurred during irradiation or chemotherapy after medulloblastoma removal as signs of cerebral oedema.
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PMID:Value of brainstem acoustic evoked potentials in posterior fossa tumours in childhood. 186 81

Brainstem acoustic evoked potentials (BAEPs) were recorded in 16 children with posterior fossa tumours. The results were compared with the clinical course, CT scan findings and the postmortem pathological findings. Eight children had midline medulloblastoma, four children had lateral astrocytoma (two of them cerebellar, one of them pontocerebellar, and one of them craniospinal) and four children had brainstem glioma. Different BAEP pattern could be detected according to the tumour's location and histological nature: 1. In midline medulloblastoma: bilateral, symmetrical, or slightly asymmetrical I-V. IPL prolongation was the common abnormality. Beside that, some of the patients showed III-V., or I-III. IPL prolongation, or V. depression. 2. In lateral astrocytoma: asymmetrical BAEP abnormalities were seen: unilateral V. depression, and/or I-V. IPL prolongation. 3. In brainstem glioma: severely distorted waveform could be observed, with depression and gradual disappearance of components following the wave III. Based on these results BAEP measurement seems to be useful in the differential diagnosis of posterior fossa tumours of childhood, and it can be necessary even beside the CT scan. It can be useful in the early diagnosis, because the BAEP positivity can precede the CT scan positivity, in such a case repeated CT scan required. Finally BAEP measurement proved to be effective in the follow-up of posterior fossa tumours: it can document the tumour's chemotherapeutic regression, or the progression. It is a simple, non-invasive, and cheap method.
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PMID:[Brainstem acoustic evoked potential (BEAP] in children with posterior fossa tumors]. 231 75

The radiological and clinical features of 90 histologically verified intraventricular masses were reviewed. Computed tomography (CT) and plain X-rays were available in all and angiograms in over half the cases. The localisation, effects on the adjacent brain substance and the presence and degree of hydrocephalus was evident on CT. Two-thirds of colloid cysts presented as pathognomonic anterior third ventricular hyperdense masses and the other third were isodense; an alternative diagnosis should be considered for low density masses in this situation. Plexus papillomas and carcinomas mainly involved the trigone and body of a lateral ventricle of young children and caused asymmetrical hydrocephalus; the third ventricle was occasionally affected also in children and the fourth ventricle more frequently and usually in adults. Two-thirds were hyperdense, one-third of mixed or lower density. The meningiomas were dense trigonal tumours of adults generally arising in the choroid plexus, but two tentorial meningiomas passed through the choroidal fissure and caused a predominantly intraventricular mass. Gliomas frequently thickened the septum and generally involved the frontal segments of the lateral ventricles. They may be supplied by perforating as well as by the choroidal arteries, which supply most other vascularised masses within the ventricles. Only 10% of our cases did not fall into one of the former categories; these included low density non-enhancing dermoid or epidermoid tumours and higher density enhancing metastatic or angiomatous masses.
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PMID:Diagnosis of masses presenting within the ventricles on computed tomography. 685 76

Among non-neoplastic lesions of the central nervous system, demyelinating pseudotumors of the group of acute disseminated encephalomyelitis (ADEM) most frequently occasion neurosurgical intervention for purposes of definitive diagnosis and thus enter the domain of the surgical pathologist. Typically, ADEM presents with multifocal, bilateral lesions in an asymmetrical distribution. Especially monolocular manifestations may be diagnostically challenging. Due to the acuteness of clinical symptoms and the expansive, space-occupying character of the lesions a diffuse glioma, a metastatic disease, a primary cerebral Non-Hodgkin's lymphoma, brain abscess, a parasitosis or an ischemic brain tissue necrosis may be suspected. This impression is supported by uptake of contrast-medium most pronounced at the periphery of the lesion and the subcortical location. The histomorphologic feature of relative axonal preservation in areas with acute myelin breakdown and lymphocytic infiltrates make the diagnosis of an acute primary demyelinating disease probable. A diagnosis of glioma may be prompted by the florid, cytologically atypical astrogliosis especially in intraoperative request. Based on a series of 14 cases of radiologically and bioptically documented cases of ADEM typical examples will be demonstrated and discussed.
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PMID:[Neuropathological and neuroradiological aspects of acute disseminated encephalomyelitis (ADEM)]. 1114 18

The surface properties of the extracellular matrix play vital roles in cellular behavior such as adhesion, spreading, migration, proliferation and differentiation. While cell attachment and adhesion onto surfaces are mainly mediated by surface molecular interaction, cell morphology and orientation are significantly affected by the topographical cues of the substrate. We reported here the alignment of C6 glioma cells on polystyrene (PS) substrate containing periodic nanotopography. The ridge/groove type structures (210 nm in periodicity, and 30-40 nm in depth) were generated on polystyrene surface using Nd:YAG polarized laser radiation at 266 nm. The cultured cells were shown to align strictly along the direction of the ridges/grooves. And there were distinctive features such as elongated morphology and asymmetrical cell surface extensions, revealed by confocal laser scanning microscopy (CLSM), atomic force microscopy (AFM), and scanning electron microscopy (SEM). The results indicated that ordered and continuous nanostructures on substrates can pattern cell, and guide cell alignment and oriented growth along definite directions. The possible mechanism and significance of these observations were also discussed.
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PMID:Nanotopographical guidance of C6 glioma cell alignment and oriented growth. 1504 11

Asymmetrical cell division is a mechanism that gives rise to two daughter cells with different proliferative and differentiative fates. It occurs mainly during development and in adult stem cells. Accumulating evidence suggests that tumour cells arise from the transformation of normal stem cells. Here, we propose that the asymmetrical mitosis potential of stem cells is associated with the generation of migrating tumour progenitors. Application of this speculative model to glioma proposes that the sites where tumour-initiating stem cells reside are indolent and distinct from the tumour mass, and implies that the tumour mass is continuously replenished with new migrating tumour cells from these clinically silent regions. This hypothesis offers explanations for our inability to cure glioblastoma and points to asymmetrical division as a new potential therapeutic target.
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PMID:Development of gliomas: potential role of asymmetrical cell division of neural stem cells. 1528 41

In humans, high-grade gliomas may infiltrate across the corpus callosum resulting in bihemispheric lesions that may have symmetrical, winged-like appearances. This particular tumor manifestation has been coined a "butterfly" glioma (BG). While canine and human gliomas share many neuroradiological and pathological features, the BG morphology has not been previously reported in dogs. Here, we describe the magnetic resonance imaging (MRI) characteristics of BG in three dogs and review the potential differential diagnoses based on neuroimaging findings. All dogs presented for generalized seizures and interictal neurological deficits referable to multifocal or diffuse forebrain disease. MRI examinations revealed asymmetrical (2/3) or symmetrical (1/3), bihemispheric intra-axial mass lesions that predominantly affected the frontoparietal lobes that were associated with extensive perilesional edema, and involvement of the corpus callosum. The masses displayed heterogeneous T1, T2, and fluid-attenuated inversion recovery signal intensities, variable contrast enhancement (2/3), and mass effect. All tumors demonstrated classical histopathological features of glioblastoma multiforme (GBM), including glial cell pseudopalisading, serpentine necrosis, microvascular proliferation as well as invasion of the corpus callosum by neoplastic astrocytes. Although rare, GBM should be considered a differential diagnosis in dogs with an MRI evidence of asymmetric or symmetric bilateral, intra-axial cerebral mass lesions with signal characteristics compatible with glioma.
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PMID:Canine Butterfly Glioblastomas: A Neuroradiological Review. 2745 89

Autoantibodies to leucine-rich glioma-inactivated protein 1 (LGI-1) are associated with inflammation of the limbic system. Faciobrachial dystonic seizures are pathognomonic for LGI1-antibiodies and their treatment with immunotherapy is effective in seizure control with a potential to prevent cognitive decline. We report a 57-year-old man who presented to the emergency department with recurrent seizures, visual hallucinations and severe memory impairment over a seven-week period; he reported a background of alcohol excess. Initial investigations revealed hyponatremia, indicating syndrome of inappropriate anti-diuretic hormone secretion. Magnetic resonance imaging of the brain revealed bilateral asymmetrical high-T2 and low-T1 signal in the medial temporal lobes. Serum immunofluorescence assay tested positive for LGI-1 antibody. Patient responded to treatment with levetiracetam, intravenous methylprednisolone and five plasma exchange sessions. Patient remains on a maintenance dose of prednisolone and azathioprine. It is imperative that clinicians recognize signs of autoimmune encephalitis in order to curb long-term sequelae and improve clinical outcomes.
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PMID:Leucine-rich glioma-inactivated protein 1 (LGI-1) mediated limbic encephalitis associated with syndrome of inappropriate antidiuretic hormone secretion: a case report. 3203 79