The 39-year-old Australian pop singer, who announced she had the illness in 2005, urged women to follow their intuition as this may save their life.
“If you have any doubt, go back again,” Minogue told viewers of the Ellen DeGeneres’ chat show in the US.
Appearing nervous, she said: “Listen, this is an opportunity for me to say something that I have not said before. I was misdiagnosed initially.
“So my message to all of you, and everyone at home is, because someone is in a white coat and using big medical instruments doesn’t necessarily mean they are right.”
“I don’t want to say that to frighten people but that’s just a fact.
“You must follow your intuition and if you have any doubt go back again.”
Minogue told viewers she started her Showgirl tour after being told that she was “fine” by a doctor.
But she said she had heard many stories from other women who had been to see a doctor for a diagnosis and were told things were fine, only to find out there was a problem later.
Minogue was in the US promoting her album X, which was released in North America last week after reaching number four in the UK top 40.
She said she had no intention of talking about her misdiagnosis on the show until she realised that its host, actress and comedian Ms DeGeneres, had been affected by breast cancer too.
Minogue did not give the date of the misdiagnosis, how long she went before the second check, or if the misdiagnosis occurred in Australia or Britain.
Stephanie Forman, a clinical negligence specialist from law firm Irwin Mitchell, said: “Most people have an intuitive feeling that things aren’t right and yet in our experience some doctors try and convince them that their symptoms are not genuine.
“Kylie was very lucky to have the presence of mind to seek a second opinion. and I would urge everyone who fears that they may not have the correct diagnosis to seek a second opinion and be persistent.” he said.