Jonah Lomu, treated twice recently for renal problems in hospital, said in an interview that he feels better but still expects to undergo another kidney transplant.
"I'm trying to live my life as normal while knowing that I will maybe have to have another transplant. I'm on dialysis three times a week," the ex All Black told Le Figaro newspaper.
The powerful former winger, 37, diagnosed with a rare renal disorder in 1995, had a transplant eight years ago and fell ill again last September during the Rugby World Cup. He was in hospital for a fortnight.
Medical tests revealed that his body was rejecting the new kidney donated by friend and radio broadcaster Grant Kereama and that he would need a second transplant.
Lomu told the newspaper he had not ruled out a return to Europe, possibly in a coaching role.
He played at Marseille side Stade Phoceen in 2009.