The 2250 dwt freighter Celina in the Baltic Sea off the Swedish coast reported that it had damage to a wing tank.   The damage resulted in a 10 to 15 degree list causing the vessel to heel.  The damage allowed water ingress from the wing tank into the cargo hold.  The crew of 4 on board stated that the list is undercontrol with bilge pumps.  Reports state the vessel will need further inspection of damage before it can proceed.