Fergus McFadden is out of Leinster's first back to back match against Harlequins.
The Leinster back has already missed the opening European Champions Cup pool matches and the November tests due to an ankle ligament injury.
McFadden had surgery this week on a thumb injury which Matt O'Connor explained today
Some better news regarding long term injuries Cian Healy and Marty Moore.
O'Connor revealed both props could feature in rounds 5 or 6 of the European Champions Cup but not so for Sean O'Brien who's recovery will take longer.
Rob Kearney, Luke Fitzgerald, Kane Douglas, Mike McCarthy and Tom Denton have all been declared fit by Leinster Rugby.
