Backround: Nasopharyngeal carcinoma (NPC) characterized with neck lymph nodes and distant organs metastasis is the most common one of tumors in head and neck.
背景和目的：鼻咽癌是头颈部恶性肿瘤中最常见的一种，易于出现颈淋巴结和远处器官的转移。
Backround: Nasopharyngeal carcinoma (NPC) characterized with neck lymph nodes and distant organs metastasis is the most common one of tumors in head and neck.
背景和目的：鼻咽癌是头颈部恶性肿瘤中最常见的一种，易于出现颈淋巴结和远处器官的转移。
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