You usually start by seeing your GP. If they are unsure what the problem is, or think your symptoms could be caused by cancer, they will refer you to a hospital specialist.
At the hospital, the specialist doctor will examine you and ask you about your symptoms and general health. They will arrange any tests you need. Several tests may be used to help diagnose tracheal cancer and to check whether it has spread:
X-rays
X-rays use high-energy rays to take a picture of the inside of your body. Your doctor can use an x-ray of your chest to look at your lungs and trachea.
Lung function tests
These simple tests measure how well your lungs are working. You wear a nose clip and breathe through a mouth piece into a machine. The doctor or nurse will tell you when and how hard to breathe. You usually sit down while you’re having lung function tests. They can take 30–60 minutes.
CT (computerised tomography) scan
A CT scan takes a series of x-rays that build up a three-dimensional picture of the inside of the body. The scan is painless and takes 10–30 minutes. CT scans use a small amount of radiation, which is very unlikely to harm you and won't harm anyone you come into contact with. You may be asked not to eat or drink for at least four hours before the scan.
You may be given a drink or injection of a dye, which allows particular areas in the body to be seen more clearly on the scan. For a few minutes, this may make you feel hot all over. If you’re allergic to iodine or have asthma, you could have a more serious reaction to the injection, so it's important to let your doctor know beforehand.
MRI (magnetic resonance imaging) scan
This test is similar to a CT scan, but uses magnetism instead of x-rays to build up a detailed picture of areas of your body. Before the scan, you may be asked to complete and sign a checklist. This is to make sure that it’s safe for you to have an MRI scan.
Before the scan, you’ll be asked to remove any metal belongings, including jewellery. Some people are given an injection of dye into a vein in the arm. This is called a contrast medium and can help the images from the scan to show up more clearly. During the test, you'll be asked to lie very still on a couch inside a long cylinder (tube) for about 30 minutes. It is painless but can be slightly uncomfortable, and some people feel a bit claustrophobic during the scan. It’s also noisy, but you’ll be given earplugs or headphones.
Flexible bronchoscopy
The doctor examines your trachea using a thin, flexible tube with a light and camera at the end (bronchoscope). The doctor passes the bronchoscope into your nose or mouth and down into the trachea. Using the bronchoscope, they can take photographs and small samples of tissue (biopsies) from any areas that don’t look normal. A doctor who specialises in analysing cells (pathologist) examines the biopsy under a microscope to look for signs of cancer.
You will be asked not to eat or drink anything for a few hours before the bronchoscopy. Just before the test, you may be given a mild sedative to make you sleepy and relaxed. Once you’re comfortable, the doctor sprays a local anaesthetic on to the back of your throat to make it numb.
The test can be uncomfortable but only takes a few minutes. You should not eat or drink for at least an hour afterwards, or until your throat has stopped feeling numb. You will be able to go home when the sedative wears off, but you shouldn’t drive for 24 hours after the test. If possible, ask someone to collect you from the hospital, as you may feel sleepy.
Rigid bronchoscopy
Instead of a flexible bronchoscope, the doctor may use a straight, firm bronchoscope to keep the trachea steady while they examine it and take biopsies. You usually have a general anaesthetic for this and you may have to stay in hospital overnight.
Endoscopic ultrasound
This is similar to a flexible bronchoscopy, but it uses soundwaves to build up a picture on a computer screen. The doctor passes an ultrasound probe on the end of the bronchoscope into the trachea to examine areas nearby.
This test takes less than an hour and you can usually go home on the same day.