title: Discussion.
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood*; D005260:Female; D006801:Humans; D007414:Intestinal Neoplasms / Q000097:blood*; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000097:blood*; D018358:Neuroendocrine Tumors / Q000097:blood*; D010190:Pancreatic Neoplasms / Q000097:blood*; D013274:Stomach Neoplasms / Q000097:blood*
chemical_list: D014408:Biomarkers, Tumor