"Robbie is a true inspiration to us all. He is positive about his upcoming surgery and is looking forward to getting his recovery underway.
"The Crusaders will miss his presence on the field plus all the laughter he brings to the team off the field. However we are fully behind Robbie and our thoughts and prayers are with him.
`I have no doubt that if the surgery goes well Robbie will be back next year and will be a force to be reckoned with. He is a fantastic rugby player. I know it's been frustrating for him over the last few months that his body has not been able to perform to level he would like it to.
Fruean's rugby career had to be put temporarily on hold in 2009 when his pancarditis was first identified following rheumatic fever and he underwent open-heart surgery.
It didn't hold him back for long, though, and in his debut season with Canterbury in 2010 ITM Cup he was the joint leading try scorer and named player of the year, earning the award again in 2012. He was selected for the Crusaders in 2010 and, with 61 caps under his belt, he has racked up an impressive 80 points.
Prior to his elevation to Super Rugby, the centre also represented New Zealand in the 2007 under-19 world championship-winning side, winning IRB under-19 player of the year.