"Baden has worked so hard and impressed us with his work ethic and quality of play. We are bitterly disappointed for him but at the same time this is a very serious condition which have been life-threatening," he said.
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Wardlaw said he was born with the condition but had always played sport and been active throughout his life, playing rugby for Bay of Plenty through the age grades before then focussing on his family and career.
He returned to rugby four years ago, putting his career on-hold to give the sport his full attention and playing a key role in the success in Clayton McMillan's Bay of Plenty Steamers side.
"I thought I had finally made it. This was my dream to play for the Blues," Wardlaw said.
"I have had the fused vertebrae since birth and it has not stopped me doing anything. But to then receive this news that I should give up rugby for the rest of my life is hard to come to grips with.
"The medical people have gone to a number of specialists and they have all said the same thing. That is that if I got a knock in the wrong position I could end up as a tetraplegic or worse, I could die.
"I need to be thankful that this was found out, although right now I am still gutted because this was my dream."
Wardlaw, a competitive cross-fit athlete, said that fitness has always been an interest, and he will look to move into strength and conditioning training as a way of remaining in the sport.
The Blues are expected to announce a replacement in the coming days.
