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Virchows Archiv

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01.12.2009 | Original Article

Prognostic implications of CpG island hypermethylator phenotype in colorectal cancers

verfasst von: Jung Ho Kim, So Hyun Shin, Hyeong Ju Kwon, Nam Yun Cho, Gyeong Hoon Kang

Erschienen in: Virchows Archiv | Ausgabe 6/2009

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Abstract

CpG island methylator phenotype (CIMP) refers to a subset of colorectal cancers (CRCs) that are characterized by concordant hypermethylation of multiple CpG island loci. CIMP+ CRCs have peculiar clinicopathological features. However, controversy exists over prognostic implications of CIMP in CRCs. We analyzed 320 cases of CRCs for their CIMP status using the MethyLight assay and determined clinicopathological features and prognostic implications of CIMP alone or in combination with microsatellite instability (MSI). With methylation of five or more markers among eight markers examined, CIMP+ tumors were significantly associated with female gender, proximal tumor location, poor differentiation, nodal metastasis, more advanced cancer, BRAF mutations, MSI, and poor prognosis (all P values <0.05). Ogino’s combined eight-marker panel outperformed the Ogino and the Laird five-marker panels in detecting these features. Of the four molecular subtypes generated by the combination of CIMP and MSI status, the CIMP+/MSI− subtype showed the worst clinical outcome (P = 0.0003). However, poor prognosis of CIMP+/MSI− subtype was found to be attributed to BRAF mutation. In conclusion, the CIMP+/MSI− subtype tends to present with distinct clinicopathological and molecular features and shows the worst clinical outcome among the four molecular subtypes of CRCs.

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Titel: Prognostic implications of CpG island hypermethylator phenotype in colorectal cancers
verfasst von: Jung Ho Kim
So Hyun Shin
Hyeong Ju Kwon
Nam Yun Cho
Gyeong Hoon Kang
Publikationsdatum: 01.12.2009
Verlag: Springer-Verlag
Erschienen in: Virchows Archiv / Ausgabe 6/2009
Print ISSN: 0945-6317
Elektronische ISSN: 1432-2307
DOI: https://doi.org/10.1007/s00428-009-0857-0

Springer Medizin

Prognostic implications of CpG island hypermethylator phenotype in colorectal cancers

Abstract

Neu im Fachgebiet Pathologie

Molekularpathologische Untersuchungen im Wandel der Zeit

Vergleichende Pathologie in der onkologischen Forschung

Gastrointestinale Stromatumoren

Personalisierte Medizin in der Onkologie

Springer Medizin

Abstract

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