The<unk>  is a non-invasive screening method for the early detection of colorectal cancers and polyps which are known to be the precursors of colorectal cancer. The<unk>  which is used for stool analysis is available either as fully quantitative ELISA Test or as a rapid test that can be performed by any general practitioner without the need of a laboratory or any additional equipment. The enzyme biomarker<unk> -PK has been identified as a key enzyme in colorectal cancers and polyps. The detection of<unk> -PK does not depend on blood in the stool and is specifically related on changes in the tumor metabolism. False positive results by unspecific blood sources in the bowel are excluded and the test is able to detect both bleeding as well as non-bleeding colorectal cancers and polyps. The<unk>  is able to detect 80.3% of colorectal cancers. Testing for<unk> -PK allows for colorectal cancer screening in asymptomatic patients. An elevated concentration of<unk> -PK in the stool should always be clarified by undergoing colonoscopy. The gold standard of early detection of colon polyp/cancer is the invasive colonoscopy, but with high expense about $557, while tumor marker<unk>  expense only about $15-$25. The invasive colonoscopy makes acceptance of it low among patients, so relatively cheap non-invasive<unk>  is a good choice for detection early polyp/cancer.
M2-PK Test
Helium dilution technique
Nephelometry 
Holliday-Segar formula
Schilling test
Urea reduction ratio
AmpliChip CYP450 Test
Glucose test