Waldeyer's ring

WALDEYER'S RING

- Waldeyer’s or Pirogov tonsillar ring is a circle of lymphoid tissue located in the pharynx and to the back of the oral cavity.

- It was named after the nineteenth century German anatomist Heinrich Wilhelm Gottfried von Waldeyer-Hartz.

- The ring consists of (from superior to inferior):

i. Pharyngeal tonsil

ii. Tubal tonsil

iii. Palatine tonsils (“faucial tonsils”)

iv. Lingual tonsils

v. The tubopharyngeal plicae: Lateral bands which run almost vertically at the junction of the Lateral posterior walls of the oro- and nasopharynx.

vi. Lymphoepithelial collections in the laryngeal ventricle.