Beyonce’s mom Tina Knowles reveals breast cancer diagnosis and undergoes surgery to remove tumor

TINA Knowles, the mother of Beyoncé and Solange, revealed she was diagnosed with breast cancer.Knowles, 71, opened up about her stage one breast cancer diagnosis during an interview for her new book.Tina Knowles announced she was diagnosed with breast cancerGettyAFPBeyonce and Tina Knowles (right) at The Lion King premiere in December[/caption]GettyTina Knowles said her diagnosis came after she missed a mammogram appointment[/caption]The mother told CBS Mornings co-host Gayle Ki