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NFC North Friday injury report

Getting inside the Friday injury report, including less-than-positive updates on a number of prominent players around the division:

Chicago Bears: Linebacker Pisa Tinoisamoa (knee) won't play Sunday against the Detroit Lions, coach Lovie Smith said. Nick Roach will make his second start in three games. Vaughn McClure of the Chicago Tribune reports Tinoisamoa experienced significant swelling his right knee this week but at this point is not considered a long-term injury situation. All other Bears players should be available.

Detroit Lions: Defensive end Kyle Vanden Bosch (knee) did not practice this week, is listed as doubtful and is not expected to play against the Bears -- a huge loss for a Lions team that is disintegrating from a personnel standpoint. Turk McBride and Lawrence Jackson are expected to play in Vanden Bosch's position, but neither can offer the leadership and tenacity Vanden Bosch has provided all season. The Lions listed right tackle Gosder Cherilus (knee) as questionable, but he practiced Friday and seems likely to play. Other than quarterbacks Matthew Stafford (shoulder) and Shaun Hill (finger), all other players will be available Sunday.

Green Bay Packers: Cornerback Pat Lee (ankle) has been ruled out for Sunday's game against the San Francisco 49ers. Safeties Atari Bigby (hamstring) and Anthony Smith (ankle) are listed as doubtful, but not expected to play. All other players should be available.

Minnesota Vikings: Tailback Adrian Peterson (ankle) practiced Friday and seems on track to play in at least some capacity Sunday against the Buffalo Bills. Receiver Percy Harvin missed a second consecutive day of practice because of migraine headaches and is listed as questionable. Of all the migraine bouts Harvin has endured in the past two years, only one has kept him from playing in a game. Left guard Steve Hutchinson sat out the entire week of practice to limit impact on his fractured thumb and will be a game-time decision Sunday. Rookie Chris DeGeare would replace him if necessary. Meanwhile, cornerback Chris Cook was ruled out for a second consecutive week because of a knee injury.