Often there are no clinical signs other than the presence of the masses. Retching or gulping can sometimes be seen, as can dyspnoea if the mass is obstructing the airways. Other symptoms such as fever and pain are occasionally seen if the mass becomes infected. | Often there are no clinical signs other than the presence of the masses. Retching or gulping can sometimes be seen, as can dyspnoea if the mass is obstructing the airways. Other symptoms such as fever and pain are occasionally seen if the mass becomes infected. |