A biopsy confirmed the bad news and she promptly underwent surgery in St Vincent's Hospital and at the Blackrock clinic where she spent a week in an isolation ward and was dosed with radioactive iodine.
But the newly single star insists that she was one of the fortunate ones, as doctors managed to catch it in time and was given the all-clear in September 2012.
"It has been a mad year. It has been strangely brilliant as well though. I know it sounds mad but being sick makes you take stock of life and go, 'wow, why was I worrying about this or that'. I am more comfortable with myself now. It has taught me a lot in a very short space of time," she said.
The broadcaster told the KC Show on Today FM how this year's run-up to Christmas has been different to 12 months ago, given that she was still getting over everything.
She even took part in the Mark Pollock Run in the Dark event last month, a fundraiser to support people with physical disabilities set up after the blind athlete broke his back falling from a second-storey window in 2010.