Conservative radio talk show host Rush Limbaugh announced on Monday that he has been diagnosed with "advanced lung cancer" but plans to continue to do his program "as normally and as competently" as he can while he undergoes treatment.

Limbaugh, 69, said on the air he first realized something was wrong over the weekend of his Jan. 12 birthday, after he began experiencing shortness of breath. He said his diagnosis was confirmed on Jan. 20 by two medical institutions.

Otherwise, Limbaugh told his listeners, he was for the moment "experiencing zero symptoms."