In an interview with People published Wednesday, Dec. 11, the 72-year-old opened up for the first time about his battle with Waldenström’s macroglobulinemia, a slow-growing bone marrow cancer.

Knowles said he now "looked at the world differently" Mathew Knowles, the father of pop singers Beyonce and Solange Knowles, has revealed he was diagnosed with breast cancer earlier this year.

CNN’s Lynda Kinkade speaks with Mathew Knowles, Beyoncé’s father, as he shares his personal journey with breast cancer and the importance of early detection.

Beyonce's father Mathew Knowles has revealed he has breast cancer. The 67-year-old spoke of his diagnosis during an interview with Michael Strahan on Good Morning America, which will air on Wednesday.