Andrew Little, one of the front-runners in Labour's leadership contest which is decided tomorrow, says he has been clear of cancer for four years after a fluke test caught the disease at an early stage.
Mr Little revealed at the weekend he was diagnosed with the disease in 2009. "It was a complete fluke, I was just having a regular checkup and my wife suggested I get my PSA [prostate specific antigen] levels tested."
Subsequent testing including a biopsy revealed early-stage cancer.
Mr Little was 43 when diagnosed with the disease and received brachytherapy, where radioactive material is implanted into the prostate, just a week before Labour's annual conference later in 2009.
He has subsequently had annual checkups.