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Year: 2003  Vol. 7   Num. 2  - Apr/June Print:
Original Article
Texto Text in Portuguese
Immune Mechanisms of the Upper Airways Mucosa and Pathophysiology of Lymphatic Waldeyer.s Ring: Current Concepts
Mecanismos Imunolgicos da Mucosa das Vias Areas Superiores e Fisiopatologia do Anel Linftico de Waldeyer: Conceitos Atuais
Mnica Aidar Menon Miyake*, Cecil Cordeiro Ramos*, Alessandra Ramos Venosa*, Adriana Silva Lima*, Silvio Antonio Monteiro Marone**.
Key words:
tonsil, adenoid, immune system, immunoglobuline A, tonsillectomy.

Introduction: The upper airways (UA) are the main entrance into the human body. They present a large surface of covering mucous epithelium to form a physical barrier against infectious agents, environmental irritants, etc. There are important immune mechanisms in this area either specific or nonspecific. Aim: To present the current knowledge about the immune mechanisms of the UA mucosa, including a review about the function of Lymphatic Waldeyers Ring (LWR) and the effects of adenotonsillectomy on immune function. Methods: Review of papers catalogued in both Medline and Lilacs databasis. Conclusions: Non-specific immunological mechanisms (as mucous enzymes, mucociliary transportation, cough reflex, etc) contribute to the defense of the UA yet in infants. Specific mechanisms involve inflammatory mediators and lead to antigenic memory. Tonsils, present important anatomical and functional differences if compared to other lymphoid organs. Antibodies production in tonsils - including secretory IgA - is crucial to the individual immunological competence. The number of adenotonsillectomies has decreased since the 60s decade, under the lights of the Immunology advances. Facing the persistent controversies in the indication of adenotonsillectomy, an immunological evaluation is recommended in the pre-operative period, as well as good sense in assisting each patient.



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