Lamela has been missing since October when he picked up the hip problem in training and despite Mauricio Pochettino suggesting he will be back before the end of the season the player has been unable to return to first-team action.
The club have now released a statement saying that Lamela will undergo surgery in order to try to help him to return to a position where he can participate in training again.
Lamela had started the season well and during the last campaign he was a key part of Pochettino's pressing style.
In his absence Pochettino has sometimes moved to a 3-5-2 formation with Christian Eriksen moving inside and Dele Alli playing just off Harry Kane.
Read the full article on eurosport.co.uk: Lamela ruled out for rest of the season