Clinical Neuroscience

[Evaluation of gliomas by means of multi-model techniques]

BORBÉLY Katalin1

SEPTEMBER 20, 1994

Clinical Neuroscience - 1994;47(09-10)

[Gliomas constitute more than 50% of brain tumours. Primary malignant forms recur within 1/2 to 1 year after surgery, and even totally removed benign forms may recur. 50% of recurrent astrocytomas are more malignant than the original tumour. The time elapsing until recurrence strongly depends on the degree of malignity and the surgical removal. However, the age of the patient also plays an important role. Survival of the patient after the establishment of diagnosis also depends on the therapy. Effective treatment requires a knowledge of the degree of malignity as well as differentiation between recurrent tumour and radiation necrosis. CT and MRI scans offer high sensitivity, but poor specificity. Evaluation of tumour metabolism by means of 18F-fluoro-deoxy-glucose positron emission tomography (PET-FDG) helps to determine the degree of malignity of the gliomas, and recurrent tumour can safely be differentiated from necrosis following radiation therapy.]

AFFILIATIONS

  1. Országos Idegsebészeti Tudományos Intézet, Budapest

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[The symptoms, localization of cerebral lesions and aetiology were analysed literally data of 78 patients suffering from pure alexia (letter-by-letter reading). During the 100 years since Déjerine's first case study on the issue was been published our knowledge on the clinical and pathomorphological characteristics of pure alexia has become more exact. On the one hand, clinical symptomatology has narrowed, eg. right homonymous hemianopsia is no regarded as a compulsory concomintant symptom on the other hand, the locus of damage underlying the symptoms may be at various areas of the brain (eg. subangular), not only at the occipital regions. The role of the posterior trajectory system in the reading process emphasized. In addition however, taking into account recent neuropsychological findings, the importance of other areas of the brain is presumable. In accordance with cognitive psychological research of the reading process it is concluded that it is essential the is for our understanding of the whole reading process that all of these factors are taken into consideration.]

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