Friday, July 29, 2011
Head and neck tumors
Head and neck cancer refers to a group of biologically similar cancers of the upper aerodigestive-tract, including the lips, oral cavity (mouth), nasal cavity, paranasal sinuses, pharynx and larynx.90% of head and neck tumors are squamous cell carcinoma (SCCHN), which consists of a mucous membrane (epithelium) in these regions. Head and neck tumors often move to the lymph nodes in the neck, and it is often the first (and sometimes only) manifestation of the disease at diagnosis. Head and neck cancer is strongly associated with certain environmental factors and lifestyle factors at risk, including smoking, alcohol consumption, ultraviolet light and environmental factors and certain strains of viruses, such as those associated, for example, sexually transmitted human papilloma virus . These tumors are often aggressive in their biological behavior of patients with this type of cancer often develops in the primary and neck tumor.Head very treatable if detected early, usually with some form of surgery, although chemotherapy and radiation therapy also played an important rol.2009 estimates , the number of head and neck cancer in the United States, 35 720 new cases.