NCIt related terms : Waldeyer's Tonsillar Ring; Waldeyer's Ring;
NCIt definition : The ring of lymphoid tissue located in the pharynx, consisting of the pharyngeal,
tubal, palatine, and lingual tonsils.;
Alternative definition : CDISC: The ring of lymphoid tissue located in the pharynx, consisting of the pharyngeal,
tubal, palatine, and lingual tonsils. (NCI);