面颌部和颈部是呼吸道、食管、某些大血管和颅、脊髓神经经行分布的主要部位,并有丰富的淋巴输纳系统及为数众多的淋巴结。其组织来源于外、中、内3个胚层,因此发生病变的胚胎组织学基础复杂,种类繁多,涉及范围广泛。 The jaw and neck are the major sites of the respiratory tract, esophagus, certain large blood vessels, and the nerves of the cranial and spinal cords. They also have abundant lymphatic systems and numerous lymph nodes. Its tissue originates from the outer, middle and inner three germ layers. Therefore, the histological basis of the embryos with lesions is complex and varied, involving a wide range.