What it measures
Cells taken from the cervix are examined under a microscope for abnormal changes that, over time, could develop into cancer. In NHS screening the sample is tested for HPV first, and the cells are checked when HPV is found. Private tests may offer cell checks on their own or with an HPV test.
Why people test it
- Chosen by people who want screening between NHS invitations or outside the invited ages.
- Used to recheck cell changes picked up on an earlier test.
Typical range
There are no numbers. The lab reports no abnormal cells found (negative), or names the grade of any cell changes seen, from borderline or low grade to high grade.
Finger-prick or vein?
This is not a blood test. A nurse or doctor uses a speculum and a soft brush to take a sample of cells from the cervix, so it needs a clinic appointment.