BEN Thompson was hoping to get the all-clear earlier this week to resume training.
Thompson, 24, has been sidelined since damaging ankle ligaments in the 1-0 win at Derby County on December 14.
The midfielder scored the first goal of Gary Rowett's reign in the 2-0 win against Stoke, and featured in the new manager's first nine games.
Thompson has made 24 appearances this season and his versatility has been missed. He has played off the striker, deeper in midfield and out wide.
The Lions have also missed Shaun Williams and Ryan Leonard at various times through injury and suspension, and recruited Ryan Woods to bolster that area in January.
Thompson could be back in contention next month.
Speaking earlier this week, Rowett said: "Thommo is going to see a specialist [Tuesday], we're just waiting for the all-clear so he can start running. He's about seven or eight weeks into it.
"He's still probably about three or four weeks away, best case. It's quite difficult to know, it's hard to be too specific. When he originally got injured we thought around March.
"It looks like it could be mid to late March. But I don't want to put any pressure on him, he might start running and feel great straightaway.
"Hopefully we'll get positive news and we'll find out."
Image: Millwall FC