Cancer cells hide by going dormant, Princess Margaret study finds

December 18, 2012

In a major breakthrough that will change the way cancer is studied and treated in the future, Toronto scientists have discovered a key reason why many tumours may return after chemotherapy. In a new study, researchers at the Princess Margaret Cancer Centre have shown that some of the cells that drive tumour growth hide from common chemotherapy drugs by going “dormant” — reigniting the disease when they awaken after treatments end. (The Toronto Star)