Tina Knowles shares how a missed mammogram may have led to a delayed detection of breast cancer, and opens up about the support from her daughters, Beyoncé and Solange, niece Angie Beyincé, and bonus daughter Kelly Rowland.

Tina Knowles, the mogul and mother of musicians Beyoncé and Solange, may have a calendar peppered with glamorous engagements and to-dos, but there’s one routine appointment she wishes she hadn’t missed: A mammogram.

Tina Knowles' new memoir "Matriarch" is out now, and she is sharing more details about her life, including a battle with breast cancer.