ICD-11 definition : Persistent or recurrent inflammation of the top portion of the pharynx situated posterior
to the nose and superior to the soft palate, usually including its mucosa, related
lymphoid structure, and glands.;
Persistent or recurrent inflammation of the top portion of the pharynx situated posterior
to the nose and superior to the soft palate, usually including its mucosa, related
lymphoid structure, and glands.