The diagnostic study of choice for<unk>  cancer is colonoscopy due to its ability to visualize the tumor in its location and take biopsies from lesions in the colon.
Colorectal cancer diagnostic study of choice
Colon polyps diagnostic study of choice
Irritable bowel syndrome diagnostic study of choice
Stomach cancer Diagnostic study of choice
Appendix cancer diagnostic study of choice
Constipation diagnostic study of choice
Pancreatic cancer diagnostic study of choice
Lower gastrointestinal bleeding diagnostic study of choice