Ahmed Yehya

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OBJECTIVE This work was designed to study the biological and demographic characteristics of meningiomas and their impact on tumor recurrence in Egyptian patients. MATERIAL AND METHODS A cohort of 265 Egyptian patients with meningioma was studied. Immunohistochemistry for VEGF, Ki67, PR, CD20, and CD3 was performed. Statistical analysis was used to detect(More)
INTRODUCTION The biological behaviour of meningiomas and the risk of recurrence in individual cases cannot be predicted by using conventional histological criteria alone. A number of histologically benign meningiomas may recur, even after gross complete surgical removal. MATERIAL AND METHODS A retrospective immunohistochemical and statistical analysis of(More)
We certify that we have read this thesis and that in our opinion it is fully adequate in scope and quality as a thesis for the degree of Doctor of Philosophy in Computer Engineering. ABSTRACT In modern cryptographic methods, keys are the basis for secure communication channels and the establishment of secret keys is a challenging problem for the large-scale(More)
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