Mini tumours grown in lab are breakthrough for medicine tests

Scientists have successfully grown mini versions of patients' tumours in a lab - and then tested them against dozens of drugs to find the best possible treatment.The technique could mean patients get effective chemotherapy sooner - and are spared unnecessary side effects from drugs that do not work.Dr Nicola Valeri, the study leader and a consultant oncologist at the Royal Marsden Hospital, told Sky News: "At the moment doctors are blind to whether patients will respond or not.