Beyonce’s father belongs to 1% of men diagnosed with breast cancer. Now, Mathew Knowles is opening up about his struggles with the condition.

The father of four recently revealed his battle with breast cancer in a televised interview on Good Morning America. The ABC show aired the news last Wednesday where Knowles discussed undergoing cancer treatment.

Speaking to host Michael Strahan the 67-year-old shared that he underwent surgery in late July. Knowles said the tell-tale sign was a dot of blood that appeared on his shirts and beddings — something that his wife noticed. He then contacted his physician to get examined.

Knowles tells Strahan that his immediate move following the diagnosis was to inform his family. “That was the very first call because this is genetics,” he said on the show. “It also means that my kids have a higher chance, a higher risk. Even my grandkids have a higher risk. They handled it like they should — they went on and got the test.

The former manager of Solange and Beyonce says he has stopped consuming liquor and is making an effort to live an active lifestyle. “I just wanted to have a clean bill of health,” Knowles said.

Breast cancer is known to mostly affect women. However, Knowles urged men to be aware and get tested for the disease. Black men, in particular, are found to be more susceptible to breast cancer.

A recent study published in JAMA Oncology found that men diagnosed with breast cancer have lower rates of survival than women.