目的：头颈部肿瘤在常规的淋巴显像中缺少可利用的解剖标志，联合应用淋巴显像和骨显像以期更好地定位头颈部肿瘤的“前哨”淋巴结。方法：２６例患者经临床确诊有头颈部肿瘤；其中２０例肿瘤侵犯范围未越过脑中线，６例肿瘤范围越过脑中线侵犯到对侧。首先静脉注射９９Tcm－亚 OBJECTIVE: Head and neck tumors lack available anatomical landmarks in conventional lymphadenectomy, and are used in conjunction with lymphadenectomy and bone imaging to better target “sentinel” lymph nodes in head and neck tumors. Methods: Twenty-six patients were clinically diagnosed with head and neck cancer. Twenty cases of tumor invasion were beyond the midline of the brain, and six of the tumors invaded the contralateral side beyond the midline of the brain. First intravenous injection of 99Tcm-Asia