Anorectal ultrasound scan

An ultrasound uses sound waves to build up a picture of the tissues inside your body. An anorectal ultrasound scan takes pictures of your rectum and anus.

There is no preparation required for this ultrasound test, but you may feel more comfortable if you empty your bowel beforehand.

Your doctor should explain the procedure beforehand so that you know what to expect.

A smooth probe the size of a finger is placed in the anus. It uses high-frequency sound waves to build up a picture of the layer of tissue beneath the surface of the rectum, on a computer screen.

The ultrasound can be a little uncomfortable but it should not be painful. 

The test will last around 20 to 30 minutes.

You will be able to go home on the same day.

No. There will be no side-effects from this scan.

It is important to ask your doctor on the day of your scan when you can expect your results. Other important questions to ask can include:

• Who will give me my results? For example, will it be someone in the hospital or my GP?
• How will the results be given? Will it be by letter, phone call or face to face?

Waiting for results can be a worrying time, but knowing when to expect results can help. You should be given a contact number if you have any concerns or queries or if you are waiting longer than expected for results. 

If you need to talk to someone about the test or results, you can also speak to a cancer nurse on our Support Line. Call 1800 200 700, Monday to Friday, 9am to 5pm.