It had been previously thought that a groin injury had cut short his spell at the City Ground.
The Portuguese star, who has become something of a cult hero during his time at the club, is struggling with a groin injury. It was confirmed by recently sacked boss Dougie Freedman to BBC Nottingham Sport after the 3-0 loss to Sheffield Wednesday in mid-March that Oliveira looked likely to miss the rest of the season and would not play for Forest again.
It was then reported in Portugal that the injury had also cost him a potential place at Euro 2016.
TSF Radio Noticias reported that the groin injury was worse than feared and that Oliveira was definitely out of contention for the Euros and that he was back at parent club Benfica receiving treatment and will not be considered for the summer.
But now it is being reported that Oliveira may in fact play for Forest again this season.
The striker has been in fantastic form for Nottingham Forest this season. He has scored nine goals in 29 games for the club in an excellent season at the City Ground.
Forest will be hoping he does return from his physiotherapy in Portugal in time, as the club are currently slipping closer and closer to the relegation zone.
Oliveira might be able to stop the rot.