<unk>  <unk>  is a cancer originating in the nasopharynx (the uppermost region of the pharynx), where the nasal passages and auditory tubes join the remainder of the upper respiratory tract. On microscopic histopathological analysis, abundant dense eosinophilic cytoplasm and prominent lymphoid component are characteristic findings of<unk> .<unk>  differs significantly from other cancers of the head and neck in occurrence, causes, clinical behavior, and treatment. Common risk factors in the development of<unk>  are Chinese (or Asian) ancestry, Epstein-Barr virus (EBV) exposure, and heavy alcohol intake.<unk>  must be differentiated from normal adenoidal tissue,<unk>  lymphoma and chordoma. It is vastly more common in certain regions of East Asia and Africa than elsewhere, with viral, dietary, and genetic factors implicated in its causation. The prevalence of<unk>  is approximately 1 per 100,000 individuals in the USA. Patients of all age groups may develop<unk> . If left untreated<unk>  produces few symptoms early in the course of disease. Once the tumor has expanded from its site of origin in the lateral wall of the nasopharynx, it may obstruct the nasal passages and cause nasal discharge or epistaxis. Non-keratinizing<unk>  is associated with a 5 year survival rate of 65%. The common complications of<unk>  include airway obstruction, dysphagia, and disfigurement of the neck or face. Head and neck MRI may be helpful in the diagnosis of<unk> . The mainstay of therapy for<unk>  is external beam radiotherapy. Surgery is not the first-line treatment option for patients with<unk> .
Nasopharyngeal carcinoma
Laryngeal cancer
Oropharyngeal cancer
Hypopharyngeal cancer
Adenoiditis
Laryngeal papillomatosis
Epiglottitis
Nasopharyngeal angiofibroma