A television announcer said this was discovered when Murdoch, 69, and the owner of media conglomerate News Corp, underwent a routine medical check. ``Doctors may begin radiotherapy in a month and say the prognosis is very good,'' the Sky announcer said, citing a News Corp spokesperson.

``Murdoch has no intention of changing his work schedule,'' she added.Australian-born Murdoch acquired the US citizenship in 1985 to further his media interests in the US. He is reportedly worth $5 billion.