Fine Needle Aspiration
This leaflet tells you about the procedure known as a fine needle aspiration (FNA), explains what is
involved, and what the possible risks are.
If your procedure is pre-planned then you should have plenty of time to discuss the situation with
your doctor and the radiologist (X-ray doctor) who will be doing the FNA, before you sign the
consent form.
What is a fine needle aspiration?
This is a procedure where a needle is inserted into a lump or mass in your body to remove cells or
fluid so that it can be examined under a microscope. This is to help your doctor decide the best
course of treatment for your condition.
Are there any risks or complications?
This procedure is normally carried out during an outpatient visit and is considered very safe, but
there are some risks and complications that can arise. Some pain, bleeding, and possible bruising
around the site where the needle is inserted are the most common. Complications can vary in
severity depending on the aspiration site.
What will happen during the procedure?
You will be given the opportunity to ask any questions that you still have before the procedure
starts. You will lie on the scanning table in the position that the radiologist has decided is most
suitable. The radiologist will keep everything sterile and will wear sterile gloves. Your skin will be
cleaned with an antiseptic solution and you will have some of your body covered with a theatre
towel. The radiologist will use the ultrasound machine to decide on the most suitable point for
inserting the needle. The needle will be inserted into the lump and fluid or tissue will be removed
for examination. When the needle is removed, pressure is applied to the area briefly (to reduce the
chance of bleeding or bruising) and the puncture site is covered with a plaster.
Will it hurt?
Most patients find that this test is no more painful than having a blood test. The needle is very
small and the procedure is very quick, usually around five minutes.
What will happen afterwards?
The procedure is carried out as an outpatient and no aftercare is required.
The sample taken during the procedure will be sent to the laboratory for processing and
diagnosis. Your consultant will explain the results with you at your next out patient appointment.
If you experience any excessive bleeding, pain, bruising or swelling you should contact your GP as
soon as possible.
Who should I contact if I have any questions?
If you have any questions about this procedure, please contact the Medical Imaging Department.
You will find our telephone number on your appointment letter. We will do everything we can to
make your visit as pleasant as possible.
WPR33730 Nov 2010