Circulating Tumour DNA (ctDNA) in Patients With Colorectal Cancer and the Relationship to Imaging Features of Extramural Venous Invasion

Circulating Tumour DNA (ctDNA) in Patients With Colorectal Cancer and the Relationship to Imaging Features of Extramural Venous Invasion

This study does not involve randomization or treatment. Eligible patients have colorectal adenocarcinoma with no metastases eligible for curative surgery. A pre operative staging scan must have been completed within 6 weeks prior to surgery. Two x 20ml blood samples will be taken from each patient, one prior to and one during or within 24hrs after surgery. Patients are annually followed up to 3 years.

A multicentre observational study, ctDNA aims to provide the evidence base for metatstatic disease being caused by vascular methods of spread by determining if there is a link between EMVI status and ctDNA

Inclusion Criteria:

1. Have a biopsy-confirmed colorectal adenocarcinoma
2. Is eligible for curative surgery
3. Has no metastatic disease on CT scan
4. Has completed pre-operative staging scan within six weeks prior to surgery
5. Have provided written informed consent to participate in the study
6. Be aged 16 years or over

Exclusion Criteria:

1. Have metastatic disease (including resectable liver metastases)
2. Have a synchronous second malignancy
3. Are contraindicated for any imaging able to determine EMVI status