患者女,47岁,因右颈部肿块1个月入院,无咳嗽、咳痰、发热及其他症状。体格检查:右颈部可触及一大小约3 cm×3 cm肿块,质硬,表面不光滑,与周围组织粘连,不活动,局部皮肤颜色正常,皮肤温度不高,未见溃疡及窦道;全身其他部位未见异常。常规实验室检查未见异常。按体重5 MBq/kg 静脉注射18F-脱氧葡萄糖(FDG),暗光下安静休息1 h后行 Female, 47 years old, admitted to hospital with a right neck mass for 1 month without cough, sputum, fever and other symptoms. Physical examination: the right neck can reach a size of about 3 cm × 3 cm mass, hard, the surface is not smooth, with the surrounding tissue adhesions, inactivity, local skin color is normal, the skin temperature is not high, no ulcers and sinus; Other parts of the body without exception. No abnormalities in routine laboratory tests. According to the body weight of 5 MBq / kg intravenous injection of 18F-deoxyglucose (FDG), dark light quiet rest for 1 h