Tonight, the Florida Panthers will host Hockey Fights Cancer Night when they take on the New York Islanders at BB&T Center. The cause hits home for Panthers defenseman, Erik Gudbranson. Gudbranson’s little brother Dennis, is a cancer survivor.

When Dennis was five-years-old, he was diagnosed with acute myeloid leukemia (AML). AML is when white blood cells, produced in bone marrow, are abnormal and do not become healthy cells. The abnormal cells crowd normal cells in the body, making it difficult for fighting infections. Gudbranson was 11 at the time of Dennis’s diagnosis.