Meanwhile, the second-round draft pick has missed his second straight practice.
"I'm not certain yet. He's still under evaluation. He's still got to see the doctors," Caldwell said prior to Monday's practice. "Doctor is going to tell him to go to a specialist to take a look at it and we'll make a determination at that point in time where he is."
Van Noy was one of three Lions players not practicing Monday, joining safety Don Carey (hamstring) and running back Reggie Bush. Both TJ Jones and DeJon Gomes were in attendance as well, but Jones is on the PUP list and Gomes is on season-ending injured reserve.
Running back Montell Owens, who suffered a head injury Friday night against Jacksonville, returned to practice on Monday.