Colorectal cancer is preventable in many cases if diagnosed in its early stages.
There are various ways to test for whether there are early indications of colorectal cancer developing, these may include:
- An examination of the intestine by a thin flexible tube with a light on the end known as a colonoscope
- This examination is known as a colonoscopy or a sigmoidoscopy
- A simple test done at home to determine whether there are traces of blood present in the stools (faeces) known as a Faecal Occult Blood Test
- A CT (computerised tomography) scan - a high quality X-Ray
- MRI scan (Magnetic Resonance Imaging) - an examination of the intestine by strong magnetic and radio waves. This test is only carried out when there is a possible or confirmed rectal cancer


Sigmoidoscopy examines only
the lower third
The Code Against Cancer and the EU Council (2003) recommends faecal occult blood screening for colorectal cancer in men and women aged 50 -74.