Scotland flank Alasdair Strokosch could miss the rest of the Six Nations with a fractured hand.
The 28-year-old suffered the injury during Scotland's 13-27 loss to Wales in Cardiff on Sunday and, in a statement issued by the Scottish Rugby Union, team doctor James Robson said: "Recovery from such an injury takes typically between four to six weeks."
The Six Nations is due to end on March 17, when Scotland are away to Italy.
Strokosch, who won his 25th cap against Wales, was replaced at the Millennium Stadium by John Barclay, who could now start in the back row against France at Murrayfield on February 26.
Meanwhile Scotland were also waiting on news over wing Max Evans, who went off early against Wales with an ankle injury.
"Max will be seen by the specialist ankle surgeon John McKinley at Spire Murrayfield Hospital today and we will await a further update later this week," Robson added.
Back row David Denton (foot) and prop Ed Kalman (neck) also needed medical attention after the Wales game and will be monitored ahead of the France clash.
Sunday's defeat was Scotland's fourth straight loss in all competitions and their second in as many Six Nations matches this term, following the 13-6 reverse against England at Murrayfield.
Scotland have now lost nine of their 12 Six Nations matches under Andy Robinson, the former England coach.
The Scots now face yet another battle to avoid the wooden spoon and they next play World Cup finalists France, a team they've beaten just once in their last 12 Six Nations matches.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.