Adrian Harrison - Respiratory Physician
Private Service, Respiratory
Fine Needle Aspirate
When a lump or tissue thickening are seen on the CT scan, a fine needle aspirate (FNA) - also known as a needle biopsy - can be done to get a sample of the tissue. In the case of a lump inside the chest, a fine needle is inserted through the chest wall into the lump or tissue in question, and cells are sucked into the needle. The specialist doing the test can tell where to place the needle because he is guided by CT scanning images being taken during the test.
Before starting, the skin surface is cleaned, and then local anaesthetic is put into the skin and muscle to prevent pain.
The risks from doing an FNA depend on the body part from which the sample is taken. Your doctor will need to discuss the risks before the FNA test is performed.