You usually start by seeing your GP if you have symptoms. They will ask you about your symptoms and examine you.
They will then decide about whether to refer you for tests or to a specialist. You have further tests if you have cancer. These tests are to find out its size and whether it has spread. This is called staging.
Doctors can use an endoscopy or a barium swallow to help diagnose oesophageal cancer.
These tests find out the position of the cancer, how big it is and whether it has spread.