Tina Knowles wants women to stay on top of their mammogram appointments. In an interview with People, Knowles revealed she was diagnosed with stage 1 breast cancer in her left breast last July.

Tina Knowles, mother of Beyoncé and Solange Knowles, is opening up about a recent health issue. The author of a brand-new book, "Matriarch: A Memoir," Tina Knowles spoke with People about her recent breast cancer diagnosis and subsequent recovery in an interview published Tuesday.

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.