DNA was extracted from FFPE sections and standardized to a concentration of 4 ng/μL using the DNeasy kit (Qiagen). Mutational landscaping was performed by the Glasgow Precision Oncology Laboratory using an in-house genomic panel assay of 151 cancer-associated genes (Supplementary Table S1; ref. 22 (link)). Targeted capture libraries were prepared from 150 to 200-ng DNA. Sequencing was performed using an Illumina HiSeq400. The maftools (23 (link)) package was used to generate oncoplots, forest plots, and co-barplots to compare the mutational landscape for primary colorectal cancer and CRLM with morphological and immune cell integration.
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