You have been referred either because you have symptoms (such as cough or hoarse voice) and need a scope to look into the airways, OR your specialist has identified a spot on the larynx which needs a biopsy (sample) and then possible treatment, The spot may or may not be cancer- that is why the biopsy is needed. After that the correct treatment would be considered depending on the result, that is, whether it is a cancer or not. If possible we would like to take a test of your breath before the biopsy. Alternatively we can take a breath test 2 weeks after a biopsy.