Dr Liesbeth Lenaerts talks to ecancer at ESMO 2018 about a pre-existing pre-natal test which flagged up copy number alterations and cancer in the foetus' parents.

The test was then developed and trialled on elderly patients and it was further verified that this test could detect cancer in most of those patients.

Dr Lenaerts goes into more depth about the nature of these copy number alterations.

ecancer's filming has been kindly supported by Amgen through the ecancer Global Foundation. ecancer is editorially independent and there is no influence over content.