In January 2024 Isabella Strahan, the daughter of NFL legend Michael Strahan, revealed she was diagnosed with  medulloblastoma, a type of malignant brain tumor that develops in the cerebellum, the back of the brain where movement and coordination are controlled, according to the Preston Robert Tisch Brain Tumor Center at Duke University, where she was treated.

In July 2024, Strahan revealed she was officially cancer free and returned to the University of Southern California to resume her studies. Just over a year later she and twin sister Sophia are set to share the story of their relationship – and how it changed – during the cancer journey.

The sisters shared their story in ABC News correspondent and 20/20 co-host Deborah Roberts’ new book Sisters Loved and Treasured: Stories of Unbreakable Bonds, which features more than 50 conversations, meditations, anecdotes and other deeply personal accounts from Viola Davis, Jenna Bush Hager, Octavia Spencer and more.

During their conversation for the book, the sisters revealed how their relationship has changed since Strahan was diagnosed with cancer.

Michael Strahan Supports Isabella's Modeling amid Brain Tumor Diagnosis

“It put so much into perspective. I  would worry about small things and then understand,  at the end of the day, they were trivial. It made me realize how special my relationships with my family are,” Isabella Strahan said.

“It turned everything upside down. It changed the dynamic of our relationship for a while  because I was supporting her a lot and being there for her, which is not something I’ve really had to do before…” her sister agreed.

The cancer survivor admitted the sisters used to be “very difficult” when it came to their personal property like clothing. “Before I got sick, I would tell  her what clothes of mine she couldn’t wear. But my stuff would always disappear. Then, when I was sick, she let me wear any of her clothes,” she said.

However, that’s all changed since.

“Well, not many people can say they’ve gone through something so difficult and have someone who has been there the whole time,” she added. “You have friends who are there for you, but they’re not reaching out as  much as your twin sister would. That was great. It’s brought us a lot closer. We still get in fights. She says, ‘You’re fine now. I can take your things.’”