WATCH: Eric Dane on ALS Diagnosis: "I Have One Functioning Arm" (VIDEO) originally appeared on Daytime Confidential. Grey's Anatomy alum Eric Dane is opening up about his amyotrophic lateral sclerosis (ALS) diagnosis. In an interview on Good Morning America, Dane shared with Diane Sawyer how he and his family are coping with the disease.

In an exclusive interview with Diane Sawyer, the actor discusses his ALS diagnosis, the challenges ahead and why he remains hopeful.