ArticleChild's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery2012
Biologic tumor behavior in pilocytic astrocytomas.
Article in Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 14 citations in OpenAlex.
- Article
- Is it a new culprit? "TERT promoter mutation" in an aggressive pediatric pilocytic astrocytoma.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2021Article
- Pediatric cerebellar astrocytoma: a review.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2015Review
- Common molecularcytogenetic alterations in tumors originating from the pineal region.Oncology letters · 2015Article
- Commentary.Journal of neurosciences in rural practice · 2013Article
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6 authors at 5 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
purposeThe aim is to describe the behavior of pilocytic astrocytoma (PAs) and its effects on patient prognosis by using flow cytometric, immunohistochemical and cytogenetic methods. We also aim to find out whether there is any difference between differently localized tumors by the above mentioned analyses.
methodsWe studied DNA index, expression of p53, p16, pRb, MMAC/PTEN1, VEGF, MIB-1 index and chromosomal anomalies which can be detected by array comparative genomic hybridization (CGH) technique. We analyzed the association of the results of these studies with clinical prognosis and tumor localization. We included 53 patients (18 cerebellar, 20 chiasmatic/hypothalamic and 15 hemispheric). Samples were studied from paraffin embedded tumors.
resultsWe found that PAs are mostly diploid and ploidy pattern does not affect the prognosis. The expression of p53, p16, pRb, MMAC/PTEN1 and VEGF was not significantly different between different localizations and could not predict the prognosis. Frequently seen copy number aberrations (CNAs) are: amplification in 1p36.33, 2p11.2, 9p11.2, 9q12, 16p11.2, 19q13.12-q13.2, Xp22.2-p21.3, Xp11.3-p11.22, Xq11.1-q12, Xq13.1, Xq21.1-q21.31, Xq22.3, Xq26.3 and homozygous deletion in 2p11.2, 8p23.1, 16p12.3. Among them, 2p11.2 amp, 9p11.2 amp and 1p36.21 hom del were correlated with prognosis. Moreover, we found a significant correlation between 16p11.2 amp and tumor localization.
conclusionsDifferently localized PAs have different properties which make them behave with different biological aggressiveness. PAs demonstrate a significant amount of CNAs that can be detected by a high-resolution study. However, tumor suppressor genes p53, p16, pRb, MMAC/PTEN1 and expression patterns do not play a significant role in PAs.
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