Former Giants DE Michael Strahan's Daughter Shares Heartbreaking Medical Diagnosis

"I woke up, probably at like 1 p.m. I dreaded waking up," Isabella told GMA's Robin Roberts. "But I was throwing up blood. I was like, 'Hm, this probably isn't good.' So I texted [my sister, Sophia], who then notified the whole family."

Her family urged her to seek medical attention. Following a series of diagnostic tests, the Strahans received the crushing news that Isabella had a fast-growing tumor in the back of her head that was about the size of a golf ball.  

"I don't really remember much," Strahan said when he learned of Isabella's diagnosis. "I just remember trying to figure out how to get to LA ASAP. And it just doesn't feel real. It just didn't feel real."

One day before her 19th birthday in October, Isabella underwent emergency surgery at Cedars-Sinai in Los Angeles to remove the tumor. She has since undergone radiation treatment and will soon begin chemotherapy.

Isabella said she decided to share her condition with the world to help others who might be going through a similar situation.

"I hope to just kind of be a voice and be [someone] who maybe are going through chemotherapy or radiation can look at," she said.

Her courage has already inspired her father.

"I literally think that in a lot of ways, I'm the luckiest man in the world because I've got an amazing daughter," the Hall of Fame defensive end told Roberts. "I know she's going through it, but I know that we're never given more than we can handle and that she is going to crush this."