Leicester City boss Enzo Maresca says the club signed striker Tom Cannon knowing he had a stress fracture in his back.
The 20-year-old was a transfer deadline day arrival from Everton.
Cannon had featured for the Toffees in the Premier League against Wolves just six days before making his move to the King Power Stadium.
"Because it is a long-term investment it doesn't mean we don't need him now," Maresca told BBC Radio Leicester.
"But we prefer to be careful with that and make all the checks that we need to do.