Abstract
Colorectal carcinoma is the fourth most commonly diagnosed malignancy.
As it is hidden in many cases and as the onset is undetectable, it may prove to be fatal.
Hence, early screening colorectal cancer is a way to prevent this disease. Screening
depends upon various factors, such as familial history, history of the disease, or any
condition which could lead to colorectal carcinoma. Various tests, such as fecal occult
blood test, sigmoidoscopy, and CT scan, are available for screening. The screening
method to be used depends upon various contributing factors. Screening can be
invasive or can be non-invasive using many markers.
Keywords: Detection, Early diagnosis, Novel tests, Screening tests.