Dr. Matthew Strickland, a medical oncologist at Mass General Hospital, discusses the likely goals of adjuvant chemotherapy for Kate, Princess of Wales. In a statement, she described the treatment as "preventative chemotherapy" and Strickland said that likely means a treatment intended to clear out any cancer cells that may have been left behind after surgery. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/