Cyfra 21-1 Antigen

Cyfra 21-1 Antigen


The Cyfra 21-1 Antigen test measures the amount of cytokeratin 19 fragment present in your blood. Elevated levels may be associated with certain cancers, especially non-small cell lung cancer, and can help doctors monitor disease progression or response to treatment. This test is typically used alongside other clinical findings and diagnostic tests.

Parameters Covered

Cyfra 21-1 Antigen

What the Test Measures

This test measures the level of Cyfra 21-1, a protein released into the blood when certain cells, particularly cancer cells, break down. Monitoring Cyfra 21-1 levels can help assess treatment effectiveness and detect changes in health status over time.

Turnaround Time for Results


Leicester: Most results are available within 1–2 working days (some tests may take longer)
Outside Leicester: Results are typically available within 2–4 working days (some tests may take longer)
Certain parameters: Some specialised tests may take 2–3 weeks to process.

How Results Are Delivered

Your personalised report will be securely sent to your registered email address.