Study: Blood test tracks how cancer patients respond to treatment
The current method to assess whether a tumor is growing or spreading is to take a biopsy, removing small samples of tissue and sending them to a lab for analysis.
British researchers studied three bio-markers that might be non-invasive alternatives to biopsies.
They report, circulating tumor DNA gave the most accurate real-time picture of changes taking place in the body.
A larger randomized trial is needed before the method can be considered for clinical use.