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Meningiomas in Singapore: Demographic and Biological Characteristics

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Abstract

We sought to determine the relative incidence of meningiomas compared to other central nervous system tumours in an Asian surgical series, as well as the demographic and biological characteristics of these meningiomas. A review of 655 consecutive cases of central nervous system tumours from 583 patients representing the last five years admissions to one hospital in Singapore was undertaken. A total of 33 malignant/atypical tumours from 19 patients and 196 benign meningiomas from 187 patients were identified. Twenty malignant/atypical and 20 benign tumours were selected at random and subjected to histochemical and immunohistochemical analysis using antibodies directed against p53, bax and 3′-DNA hydroxy groups (TUNEL). Meningiomas comprised some 35.2% of all central nervous system tumours with malignant/atypical meningiomas representing 9.2% of meningiomas. Histochemically, necrosis was the predominant finding. However, peri-necrotic areas displayed p53 positivity in 10% of cases and bax positivity in 25% of cases. Apoptotic cells were detected in the peri-necrotic areas in 90% of benign and 75% of malignant/atypical meningiomas. Meningiomas represent the predominant form of central nervous system tumour in the Singaporean population, and aberration of p53 expression is not associated with tumour formation or progression. There was a slight but non-significant reduction in apoptosis in the progression from benign to malignant meningioma, suggesting that in contrast to many other tumour types disruption of cellular apoptosis is not a predominant driving force in Asian meningioma tumourigenesis.

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Authors and Affiliations

  1. Department of Neurology, National Neuroscience Institute, Tan Tock Seng Hospital, Singapore

    Asha Das

  2. Molecular Biology Laboratory, Tan Tock Seng Hospital, Singapore

    Wen-Ying Tang & Duncan R. Smith

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  1. Asha Das
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  2. Wen-Ying Tang
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  3. Duncan R. Smith
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Das, A., Tang, WY. & Smith, D.R. Meningiomas in Singapore: Demographic and Biological Characteristics. J Neurooncol 47, 153–160 (2000). https://doi.org/10.1023/A:1006484829159

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