Lee Dong-gun, 45-year-old South Korean actor, was diagnosed with ankylosing spondylitis during his appearance on the latest episode of a popular TV show. The Sunday episode of "My Little Old Boy," an SBS show following single celebrities who are past the age conventionally considered a prime marriage age, featured Lee visiting the hospital for severe symptoms on his eye. Ankylosing spondylitis does not have a known cure, but the symptoms can be managed to improve physical functions and slow its progress. Treatment includes a combination of physical therapy, exercise and medication, and the actor was told to manage his diet and refrain from alcohol and tobacco. Lee, who blossomed as an actor after a failed singing career, shot to stardom via his role in the 2004 drama "Lovers in Paris."