“I think him and the football club will prepare for the year without him then we’ll see how we go.
“Our challenge right now is supporting him and giving him the best rehab program to allow him to get back the fittest and strongest that he can.
“When that may be, we don’t know.”
Curnow’s latest setback continued a horror run with his right knee that began when he sustained season-ending ligament damage in a round-15 win over Fremantle last year.
He then dislocated his right patella while playing basketball with friends in October and broke the same bone in November when he slipped on tiles.
The key forward had surgery to insert a pin after the basketball incident, then had wires wrapped around the patella to mould it together after the fracture.
An operation in March to remove those pins and wires was hailed a success as it allowed him to move more freely and increase his training loads.
But the club announced on April 17 that scans had revealed a hairline stress response related to one of the screw holes made during the original surgery in October.
“We just need to take the smart approach with him,” Teague said.
“We love him as a person and a footballer, and we just want to see him back out there happy and playing footy.”