Cancer: what does it mean "at presentation"?
&quot;Presentation&quot; is the event where the patient first visits the doctor.
For example, &quot;the patient presented with yellowing skin and complaining of abdominal pain&quot;.
The paragraph you have doesn't make this clear, they assume you have already had your genome sequenced prior to visiting the doctor, who looks at the result, uses this tool and predicts what is likely to happen to you and your cancer based on your DNA.