Redskins linebacker London Fletcher did not attend practice as doctors continued testing him to determine the source of his balance issues.

Coach Mike Shanahan said Fletcher, who already had spent six to seven hours with the doctors, was still being evaluated. The team would not know the results of those tests until Thursday night.

Shanahan said he doesn’t know if Fletcher suffered a concussion, adding that the tests will determine whether or not that was the case.

Fletcher has played in 231 straight games, a streak that now is jeopardy.

“If he’s able to go you know he’ll go,” Shanahan said. “I’m sure he’s scared, too. Anytime you deal with a balance issue it’s something that’s out of your control. London’s a smart guy he wants to play but at the same time he understands if there’s something wrong with your balance it’s a tough situation to be in.”

Shanahan said he first heard of Fletcher’s recent balance issues on Monday. Shanahan said he doesn’t know if Fletcher had issues with this during the summer. He missed several days of practice as well as the Chicago preseason game because of an undisclosed illness.

“Only London could [tell you] if he has had that. He hasn’t shared that with us,” Shanahan said. “But a lot of players don’t. I’m sure everyone gets nicked up here and there. It’s very hard to find out what guys who have been in the league for a while if they’ve had any problems. Talking to London I’m not sure of any.”

Shanahan said he’s not sure how Fletcher’s hamstring is and can’t know until he runs. But he can’t run until the balance issues are resolved.