Can we Use a Simple Blood Test to Reduce Unnecessary Adverse Effects From Radiotherapy by Timely Identification of Radiotherapy-resistant Rectal Cancers? MeD-Seq Rectal Study

MeD-seq analyse: DNA treatment bisulfite --\> unmethylated C-nucleotide trabsformed in uracil.--\> PCR --\> next generation sequencing (NGS) --\> localization methylated nucleotides (enzym LpnPI).