The global television community is in mourning following the news that Eric Dane has passed away at the age of 53. Best known for his iconic portrayal of Dr. Mark McSteamy Sloan on the long-running ABC medical drama Grey's Anatomy, Dane died on Thursday after a year-long battle with Amyotrophic Lateral Sclerosis (ALS). ALS is a neurodegenerative disease that leads to the gradual paralysis of muscles. Dane's representatives confirmed the news of his passing in a statement, mentioning that he spent his final moments surrounded by his loved ones.