The results revealed that the most common 5 causes were in the following order:adenoma of thyroid gland,metastatic masses of nasopharyngeal carcinoma,tuberculosis of cervical lymphatic nodes,chronic adenitis of neck nodes and malignant lymphoma.

• 最常见的5种病因依序为甲状腺腺瘤、鼻咽癌颈转移、颈淋巴结结核、慢性淋巴结炎和恶性淋巴瘤，合占总例数的72.；8%25。