RT Book, Section A1 Suurna, Maria V. A2 Lalwani, Anil K. SR Print(0) ID 55767531 T1 Chapter 21. Management of Adenotonsillar Disease T2 CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e YR 2012 FD 2012 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-162439-8 LK accesssurgery.mhmedical.com/content.aspx?aid=55767531 RD 2024/03/29 AB Waldeyer ring describes a circular structure of lymphoid tissue located in the nasopharynx and the oropharynx. It is formed by the two palatine tonsils, pharyngeal tonsils or adenoids, tubal or Gelach tonsils surrounding eustachian tube opening and lingual tonsils. The lymphoid tissue of Waldeyer tonsillar ring contains B-cell lymphocytes, T-cell lymphocytes, and a few mature plasma cells. This tissue is primarily involved in secretory immunity and regulates immunoglobulin production.