Location and History of Tonsils

Tonsils are clusters of lymphoid tissue strategically located at the entrance to the pharynx, forming part of Waldeyer’s ring to sample airborne and ingested antigens. The palatine tonsils sit on each side between palatoglossal and palatopharyngeal arches, visible as oval swellings, while pharyngeal tonsil or adenoid lies on the posterior superior nasopharyngeal wall, and lingual tonsils cover the tongue base. Historically, tonsils were thought to be vestigial and routinely removed in the mid-20th century for recurrent infections, but now recognized as important immune sentinels producing antibodies, with tonsillectomy reserved for severe cases due to risks like bleeding and role in early immunity.