Christian Lealiifano to undergo bone marrow transplant

Lealiifano, 29, was diagnosed with leukaemia in August and continues treatment for the disease.

The 19-time Australia international said the next step was a bone marrow transplant, after his younger sister was identified as a match.

"I've had two treatments of chemotherapy which have pretty much put me in remission going into this transplant so hopefully the transplant goes well and gives me every chance of beating this leukaemia," Lealiifano told the ABC.

"Both bouts I got infections because you've got no immune system.

"It's all part of the journey. Up and down days and it definitely knocks you about, but I'm staying positive."

Lealiifano is set to be offered a position on Brumbies' coaching staff if he is unable to play during the 2017 Super Rugby season.

However, the fly-half remains optimistic over his playing future.

"I hope one day to be able to run out there on the field whether that be club footy [or otherwise]," he said.

"If not, I'm happy to accept that as well.

"You've got to go in optimistic and positive so from this stage on I'm staying reasonably positive and confident."