Scotland winger Sean Maitland will miss Saturday's Six Nations clash with England at Murrayfield through injury.
The New Zealand-born 25-year-old sustained a first-half concussion during
Sunday's 28-6 defeat by Ireland.
Maitland also damaged his right leg when landing awkwardly after contesting a high ball with Dave Kearney.
He will be subject to further investigation in an Edinburgh hospital and will be assessed later by consultant surgeon Graham Lawson.
A Scottish Rugby statement added: "We also have a number of injuries at this juncture which will impact on availability to train at the start of this week.
"But we are optimistic that players will recover in time for the England game."
Glasgow Warriors player Maitland, who made his Scotland debut against England last year, has won nine caps.