Abstract
In the pediatric cancer neuroblastoma, analysis of recurrent chromosomal aberrations such as loss of chromosome 1p, 11q, gain of 17q and MYCN amplification are used for patient stratification and subsequent therapy decision making. Different analysis techniques have been used for detection of segmental abnormalities, including fluorescence in situ hybridization (FISH), comparative genomic hybridization (CGH)-microarrays and multiplex ligation-dependent probe amplification (MLPA). However, as next-generation sequencing becomes available for clinical use, this technique could also be used for assessment of copy number alterations simultaneously with mutational analysis. In this study we compare genomic profiles generated through exome sequencing data with profiles generated from high resolution Affymetrix single nucleotide polymorphism (SNP) microarrays on 30 neuroblastoma tumors of different stages. Normalized coverage reads for tumors were calculated using Control-FREEC software and visualized through a web based Shiny application, prior to comparison with corresponding SNP-microarray data. The two methods show high-level agreement for breakpoints and copy number of larger segmental aberrations and numerical aneuploidies. Howev...Continue Reading
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