Ireland prop Cian Healy will miss the remainder of the Six Nations with the hip problem he sustained in Saturday's 24-12 defeat by England.
Healy was forced off in the first half at Twickenham with an injury head coach Andy Farrell described as a "jarred hip" and a scan has revealed the extent of the damage.
The 32-year-old is missing from a 28-man squad that will assemble in Dublin today for a two-day camp.
Healy is Ireland's first-choice loosehead and the setback means he has been robbed of the chance to reach 100 caps in this Six Nations.
The Twickenham outing was his 98th and he would have expected to have accumulated two more in the remaining games against Italy and France.
Lions second-row Ian Henderson returns to the squad having been withdrawn from the team to face England because of the birth of his son.
The players released back to their provinces to participate in PRO14 this weekend include Will Connors, Max Deegan, Chris Farrell, David Kearney, Luke McGrath and Jack O'Donoghue.
Billy Burns, Stuart McCloskey, Jack McGrath and Tom O'Toole will attend the Ireland camp following the postponement of Ulster's fixture against Benetton. Will Addison will continue his rehab in Ulster this week.