Leinster's worst fear has been realised with confirmation centre Ben Te'o underwent surgery on a fracture forearm yesterday.
A scan at St Vincent's hospital on Friday night revealed the extent of the damage and the New Zealander will be out of the game for an estimated six weeks.
Te'o's programme of rehabilitation will most likely him rule him out of the Champions Cup back-to-back matches against Harlequins in mid-December.
"It is part of the game but it is difficult when you are a new player who is trying to assimilate to a new code," said Leinster coach Matt O'Connor.
"Thankfully, he has a good big game temperament. The positives are that he can take a look at the game (Edinburgh) and try to study it a bit.
"He is going to get the greatest learning from playing and that is the most frustrating thing.
"He is still finding his feet and learning players' names. He is still trying to learn the nuances of the game.
"But, he wouldn't be here if we didn't see things previously. It doesn't change anything but it does put it back a few weeks."
There was more positive news about Wallaby Kane Doulgas.
The lock will follow return-to-play protocols under the supervision of the Leinster medical staff and should be able to make the next PRO12 League match against Benetton Treviso on November 23rd.
Meanwhile, the five points Leinster swept up against Edinburgh on Friday night have seen them move ahead of Connacht into fifth place on the ladder.
The Irish provinces occupy places third to sixth with Ulster ranked highest after seven rounds, tucked in behind leaders The Ospreys and Glasgow.
O'Connor is in the positive position of easing Jordi Murphy, Dave Kearney, Shane Jennings and Fergus McFadden back into the system.
"The performance level is a little bit irrelevant given there are 20 blokes out of the environment," said O'Connor.
"It is about prepping the guys up to get a job done at the weekend.
"The lack of combinations week-to-week makes it hard to grow your game.
"From that end, it's a little bit disjointed. But, the guys work incredibly hard every week to put out a performance tat is capable of getting us the points.
"Off the back of the sticky situation we've been in, in the League and in Europe it's been a fantastic effort from everybody involved".
They will have three weeks to convince him that they are finally free from injury when the PRO12 resumes at Treviso.
After that, the Champions Cup looms large on the horizon.
"There are a lot of big games to come in relation to the test boys being away.
"There's not a lot of time before we're into (rounds) three and four (of Europe), on into a couple of tasty Interpros and then back to Europe.
"We just have to make sure we keep doing enough to get over the line."