Profiling Microbiome Associated Metabolic Pathways in oesophageaL cancEr Survivors
The goal of this observational study is to learn about long term symptoms in oesophageal cancer survivors. The main question it aims to answer is are:

Study the changes in gut bacteria by examining saliva, stool and blood.
Investigate the products of bacteria in breath to develop a non-invasive breath test to detect the changes in gut bacteria.
Develop new strategies to treat this change and trial new treatments to improve quality- of-life in oesophageal cancer survivors.

Participants will attend an outpatient clinic, fasted for at least 4 hours for collection of breath, saliva, blood, urine, stool and complete validated healthy-related quality-of-life questionnaires.

Researchers will compare symptomatic and asymptomatic participants to detect the changes stated above.
- EligibilityCriteria: Inclusion Criteria:  Male and female patients aged 18-90 years Patients who underwent oesophagectomy for oesophageal adenocarcinoma with curative intent Disease free patients (CT with no evidence of recurrence within last 6 months or more than 5 years post oesophageal resection) Patients more than 1 year post oesophageal resection  Exclusion Criteria:  Patients with Siewert III gastro-oesophageal junctional tumours Patients with evidence of disease recurrence Patients who are unable or unwilling to provide informed written consent Patients who have received antibiotic therapy within the last 4 weeks - HealthyVolunteers: No - Gender: All - MinimumAge: 18 Years - MaximumAge: 90 Years - StdAgeList: Adult, Older Adult - StudyPopulation: Disease free survivors who underwent curative treatment for oesophageal adenocarcinoma - SamplingMethod: Non-Probability Sample