Lung cancer tumour markers

Markers can be found in blood or in tumour tissue. Their presence, absence or change may give the team additional information, but marker levels are not unique to cancer and can vary between people. Doctors combine them with scans, biopsy findings, symptoms and examination. Tissue or blood-based genomic testing is a separate kind of test that looks for molecular changes which may help identify suitable targeted treatment.

Ask whether the marker is intended for diagnosis, treatment selection or monitoring. Find out what other tests are needed and whether the result can change your plan. Take note of the test name, sample used and date, since results only make sense in context. If a treatment is proposed, ask how response will be assessed rather than relying on a marker alone.

Contact your care team promptly if breathlessness, chest pain, coughing, fatigue or voice changes are worsening. Seek emergency help for severe breathing difficulty, fainting, sudden confusion or significant bleeding. A tumour-marker result should not be used to wait out symptoms that need immediate assessment.

Which marker is relevant to my situation? Is it measured in blood or tissue? What could change the interpretation? Do I need genomic testing? Which scan or examination will be used with the marker to follow my condition?