The RaboDirect Pro12 club said Hunter, who has made 16 appearances for Edinburgh and would have been in their Heineken Cup squad, is expected to be out for around nine months following surgery.
Gregor Townsend, the Glasgow Warriors head coach, was in a brighter mood. He believes his players will go into Friday's Pro12 meeting with Leinster with confidence after their stunning defeat of Ulster in Belfast, when a converted try in injury time secured victory.
Warriors play host to the multiple Heineken Cup winners at Scotstoun, and the coach believed that the slight gap which existed between the sides last season is ever narrowing. Leinster beat Warriors home and away in the PRO12 and pipped them in the tightest of play-off semi-finals in Dublin.
"We got close to beating them last season but they held a little gap above us, so we'll be motivated," said Townsend. "It's a long campaign and, a year ago, we lost our first two games but then went on to finish third. We have won the first two against strong teams, but we know how much work lies ahead."