Eric Dane revealed he's been diagnosed with amyotrophic lateral sclerosis, also known as ALS. Here's what to know about the rare disease.

Eric Dane's ALS diagnosis has raised awareness about Lou Gehrig's disease, its symptoms, causes, and how other celebrities have battled this condition

Eric Dane—an American actor best known for playing Dr. Mark “McSteamy” Sloan in Grey’s Anatomy and Cal Jacobs on Euphoria—revealed on Thursday, April 10, that he has been diagnosed with Amyotrophic Lateral Sclerosis (ALS),