"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 37-year-old was quoted as saying in Le Figaro newspaper.
The powerful former New Zealand winger, who was 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 in his home country. He was in hospital for a fortnight.
Medical tests revealed that his body was rejecting the new kidney donated by his friend and New Zealand radio broadcaster Grant Kereama and that he would eventually require a second transplant.
Lomu, a father-of-two, is seen as rugby union's first global superstar, having risen to fame due to his stunning performances in the 1995 World Cup and his part in New Zealand's 1999 campaign.
He still holds the record for most tries at the World Cup, with 15 in total, and scored 37 tries in 63 Tests for New Zealand before illness eventually cut short his playing career.
Lomu, who played at Marseille side Stade Phoceen in 2009, told Le Figaro that he had not ruled out a return to Europe, possibly in a coaching role. – Sapa-AFP