Florian Lejeune joined Newcastle from Eibar in 2017
Newcastle defender Florian Lejeune will miss the rest of the season after suffering a "significant knee injury" in Saturday's defeat by Crystal Palace.
The Frenchman was carried off on a stretcher after injuring his left knee in a clash with Andros Townsend.
The 27-year-old, who joined the club in 2017, missed the first part of the season with a right knee injury.
He has made 12 Premier League appearances for the 15th-placed Magpies since January.
Newcastle manager Rafael Benitez said the injury looked bad following the 1-0 loss at St James' Park.
A club statement said further updates would be provided "in due course".
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