Chemoradiation therapy (CRT) followed by surgery is currently the standard of care to treat patients with locally advanced rectal cancer (LARC). CRT reduces local recurrences, but is associated with significant damage to the surrounding healthy tissue that can severely impact quality of life. Additionally, a proportion of patients (hardly) benefit from CRT. We aim to develop a diagnostic innovation, which can enable a more selective and thereby more effective use of the available therapies for rectal cancer patients. The objective of this study is to investigate whether patients can be identified who will response to CRT prior to start of the CRT in rectal cancer and therefore avoid possible severe side effects in patients who will not reponse on CRT.
Study Type
OBSERVATIONAL
Enrollment
75
MeD-seq analyse: DNA treatment bisulfite --\> unmethylated C-nucleotide trabsformed in uracil.--\> PCR --\> next generation sequencing (NGS) --\> localization methylated nucleotides (enzym LpnPI).
cfDNA methylation markers
Time frame: 4 years
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