Backstrom has missed all three Dynamo games played after the December 26 game in which he was injured. Immediately after that game, Dynamo had claimed that the injury wasn't serious and that Backstrom would play in the next game. http://translate.googleusercontent.c...e7Wa4NIHvi3EaQ

A week later (2 Jan), from twitter (the Foreign Correspondent for SportExpress.ru to CSN Washington's reporter):

Slava Malamud ‏@SlavaMalamud
@ChuckGormleyCSN May be out a couple of weeks. Neck injuries are tough to predict
https://twitter.com/SlavaMalamud/sta...93437069877249

Backstrom's agent has said that his client is "day to day, maybe week to week", whatever that means . . . .

http://www.russianmachineneverbreaks...-week-to-week/

All reports I've seen have said that he has a "neck injury".