I am a very skeptical person, so when I hear things described as “the best,” I don’t really believe it. But MD Anderson has been called the best cancer hospital in the world for years. And now, I know it’s true.

My wife, Tralisa, was diagnosed with ovarian cancer in late 2017, at a hospital near our home in Dallas. We came to MD Anderson for a second opinion.

It was there that we learned she’d been misdiagnosed. My wife...