Former Salford winger Manu Vatuvei has been diagnosed with a cyst on the brain.
The Kiwi great has not played rugby league since leaving the Red Devils last year to pursue a boxing career.
But after only one bout, which he won by KO in December, Vatuvei will not fight again on medical grounds.
“I’ve got a cyst in my brain, so that’s been tough,” Vatuvei told NRL.com.
“[There were] no symptoms, no nothing … everyone had to do a [brain] scan before the fight and they found it then and tried to rule me out of the fight, but I went on with it and came out good.”
Vatuvei, who has been part of the Tongan training camp this week, has still yet to officially announce his retirement from rugby league.
And he revealed that he still has a burning desire to play again despite numerous injury and medical setbacks.
“Right now I can’t do any boxing, but with footy they said because I must’ve had it a long time ago, I must have been all good playing [with it].
“So I’m still deciding from there. Hopefully, I hear back from that soon and decide what my future holds.”