Priyanka Chopra whose film Krrish 3 is releasing on November 1 has recently donated Rs 50 lakh to build a cancer ward in a Mumbai hospital. This act of philanthropy was done in the memory of her father Dr Ashok Chopra who passed away a few months ago after suffering from cancer. Besides the financial help Priyanka will also be present at the inauguration of the ward. What is cancer? Cancer is a group of over one hundred diseases characterised by abnormal uncontrolled cell growth. In a healthy body cells grow die and are replaced in a very controlled way.