Immunology of Head and Neck Cancers

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Abstract
Despite the ever growing collection of data concerning the function of the immune system in patients with epidermoid carcinoma of the head and neck, the precise mechanism by which these tumors effect the body's surveillance against foreign antigen is as yet unidentified. If these specific immunological characteristics of the cancer cell can be identified, laboratory analysis of these "markers" could lead to detection and treatment of cancer in its earliest stages. Included in this chapter is a review of the embryological development of the immune system, a description of the components of the immune system and their responses to invasion by tumor antigen. Measurements of immuno responsiveness of the individual are important in determining the pretreatment state of immuno-competence and in predicting prognosis following treatment. Measurements of T-lymphocyte functions and their response to immuno-manipulations can also aid in predicting which patients will benefit from immunotherapy. Finally, categorization of the multiple forms of immunotherapy including active, specific and non-specific, and adoptive mechanisms are discussed. More recent methods of related immunotherapy trials will also be mentioned. As of this writing, the trials of immunochemotherapy have not produced any conclusive results due to the lack of multi-institutional trials and limited quantities of immunotherapeutic agents for these clinical trials.