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Oropharyngeal cancer is a disease in which malignant cells form in the tissue of oropharynx. The oropharynx is the middle part of the throat that includes the base of the tongue, the tonsils, the soft palate, and the walls of the pharynx. Oropharyngeal cancers can be divided into two types, HPV-positive, which are related to human papillomavirus infection, and HPV-negative cancers, which are usually linked to alcohol or tobacco use. ==Signs and symptoms== The possible signs of oropharyngeal cancer are:〔〔(【引用サイトリンク】Oropharyngeal Cancer Treatment (PDQ®) )〕 *A sore throat that persists *Pain or difficulty with swallowing *Unexplained weight loss *Voice changes *Ear pain *A lump in the back of the throat or mouth *A lump in the neck *A dull pain behind the sternum *Cough 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「oropharyngeal cancer」の詳細全文を読む スポンサード リンク
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