The forward was withdrawn from Sunday's match with Bastia and taken to hospital to be checked after complaining about chest pains.
Saint-Etienne has revealed that Jean-Christophe Bahebeck had to be rushed to hospital during Sunday's Ligue 1 game with Bastia due to chest pains.
Paris Saint-Germain loanee Bahebeck was substituted at halftime in his side's 2-1 victory and the club confirmed that he had to undergo tests.
"After feeling chest discomfort during the match, Jean-Christophe Bahebeck was hospitalised to undergo further investigations," a statement read.
Saint-Etienne coach Christophe Galtier was reportedly close to tears as he was questioned on the reasoning for Bahebeck's withdrawal post game, and suggested the player had fallen ill.