One South Florida man became a hero when he went under the knife to save his sister’s life.

Ana Torres quickly tears up when she talks about her younger brother, Michael. “All along, I knew I was going to be fine. I just knew I was,” said Torres.

The 53-year-old has been battling lymphoma for several years, and she now has the chance to say goodbye to cancer. Torres is in desperate need of a stem cell transplant. Her brother Michael is her only match.

Michael was ready to help, but doctors said at almost 450 pounds, the procedure could cost him his life.

Read this inspirational story!