Volatiles in Breath and Headspace Analysis - Diagnostic Markers

VOC will be detected in breath with off-line and on-line testing and in skin headspace with off-line testing

Breath sampling for VOCs detections will be carried out using nano-sensor based devices (electronic nose)

Upper endoscopy with proper biopsy work-up will be used for identification and stratification of gastric lesions as well as acquisition of biopsies for microbiota testing

Colonoscopy with proper biopsy or polypectomy material work-up will be used for identification and stratification of colorectal lesions as well as acquisition of biopsies for microbiota testing

Whole blood/Plasma/serum sampling will be used to obtain information for group stratification

Facal samples will be obtained for faecal occult blood testing as well as microbiota analysis

Routine histological exam for patients undergoing curative or palliative surgery. Indication for surgery are set based on underlying condition. Study does not interfere with decision making for surgical treatment

VOC analysis from headspace of surgical specimen, biopsy materials, blood/plasma, microbiota etc.