source: suehan's blog
[Sports Today, Reporter Ko Kyung Seok]Top star Bae Yong Joon was hospitalized due to a herniated cervical disc, but it is known that he isn’t in serious condition.
On the 13th, his agency, Keyeast stated that Bae Yong Joon was hospitalized due to a ruptured cervical disc at a hospital in Seoul on the 4th. He has been receiving treatments after he was hospitalized due to his neck injury from the “TWSSG” shooting in 2007. It worsened due to the cold weather and the filming of “Dream High”.
Someone related to Keyeast said, “It’s hard for him to move around because of the pain, but it’s not serious.”
He got injured in his neck and shoulder ligament after being thrown from a horse during the “TWSSG” filming. To finish the shooting, he postponed the treatments and had surgery on his shoulder after the drama ended.
It has been known that he was transported by the ambulance because of a serious pain when he was hospitalized on the 4th. His primary doctor plans to perform the surgical procedure after watching his progress. So, it is unknown when he will be discharged from the hospital.
He appeared in the drama “Dream High”, which is on the air, as a guest star, and he is almost with finished shooting. It is known that he will be appearing at the end of drama as a guest star, but there is a chance that it will be changed according to the treatment status because the scripts haven't come out yet.
Someone associated to the filming of “Dream High” stated, “Actually, he supposed to appear in the Kirin Art School welcoming ceremony of the 4th episode which was his last appearance, but he couldn’t shoot because of his sudden hospitalization. The remainder of filming has already been done because he appeared as a guest star.”
suehan: There is detailed information on his injury from the other article; http://news.nate.com/view/20110113n23493
"It is known that the Bae Yong Joon has ruptured the 5th, 6th, and 7th cervical discs and he is under drug therapies."