Tina Knowles Breaks br Silence on Ex Mathew br Knowles' Cancer Diagnosis On the first day of Breast br Cancer Awareness month, br Beyonce's father revealed br he is battling breast cancer. Mathew Knowles made br the announcement during br an interview on 'Good br Morning America' last week. The former Destiny's Child br manager is currently cancer free. He had three br lymph nodes removed. His former spouse, Tina, br says she's thankful the br cancer was caught early.