Simply put, the part of the body above the neck is defined as the head and neck. Head and neck is the area where various organs are concentrated, including eye, ear, nose, throat, pharynx, organs in the mouth, jaw bone, salivary gland and muscles, blood vessels, nerves and thyroid gland of the neck. The structure of the head and neck is complex and interconnected, and often tumors occurring in one part or organ may also involve other parts or organs. In addition, the head and neck is also the intersection of blood vessels and lymphatic vessels of various organs in human body, so tumors of some parts or organs may also appear in the head and neck. The important organs in the head and neck are concentrated, the anatomical relationship is complicated, and the treatment methods are different. It simultaneously involves multidisciplinary medical fields such as head and neck tumor surgery, medical oncology, radiation therapy, nutrition and language therapy, social work, nursing and rehabilitation. And some parts of the tumor need to have multidisciplinary collaborative and comprehensive treatment to effectively improve the treatment effect.