摘要: Germline DNA (e.g., blood, mouthwash) is the most readily accessible source of material for identification pharmacogenetic markers therapy selection. However, cancer genome altered by many processes that could affect expression functional alleles in tumor. Consequently utility germline to predict tumor under question. Studies have suggested strong concordance between and genotype profiles markers. only one factor involved response chemotherapy mechanisms such as chromosome amplification loss, copy number variation, microsatellite instability, instability epigenetic variation (methylation) need be taken into account.