Dane -- who shot to fame amid six seasons on the hit ABC drama "Grey's Anatomy," where he played Dr. Mark Sloan, affectionately known as "McSteamy" -- said his symptoms began over one year ago, when he began to experience weakness in his right hand.

In the second part of a two-part GMA interview, Euphoria actor Eric Dane revealed that he is in a research study for his ALS and is taking medication to slow the effects of the disorder. “I’m fighting as much as I can,

Eric Dane and his doctor discussed his ALS diagnosis, symptoms and the rise in causes during an emotional 'Good Morning America' interview