United States. Public Health Service

“ Children who suffer from adenoids are usually pale, often narrow-chested, and altogether are not as strong and robust as are normal children.
But this is by no means all of the harm done by adenoids. They affect [5] the voice, disfigure the facial expression, interfere with hearing, give rise to night terrors, open the way for serious invasions by disease germs, and, through the development of chronic nasal catarrh, may lead to loss of the sense of smell. ”

“ The presence of adenoids should be suspected if the child habitually sleeps with open mouth, snores a great deal, or has frequent strangling coughing spells. Sleeping with open mouth is one of the first signs and should therefore lead at once to a careful examination by a physician. Sometimes difficulty in hearing is one of the early symptoms. Therefore, in all cases of ear trouble an examination should be made for adenoids. ”

“ Relief is immediate and the health and strength of the child usually improves rapidly afterwards. It is wrong to delay having the operation done, for the presence of adenoids not only endangers the child's health, but a few months' delay may cause considerable malformation of the jaws, palate, nose, and face. ”