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目的:探讨双期增强CT在腮腺常见肿瘤诊断中的价值。方法:回顾性分析2016年1月至2019年1月浙江衢化医院经手术病理证实的64例腮腺肿瘤患者的双期增强CT表现,比较良、恶性腮腺肿瘤的形态学特征及腮腺肿瘤常见类型的强化特点。结果:64例患者中良性肿瘤50例(78.1%,50/64),其中多形性腺瘤26例(52.0%,26/50),腺淋巴瘤17例(34.0%,17/50),其他较少见类型良性肿瘤7例(14.0%,7/50);术前双期增强CT诊断准确率为88.0%(44/50)。恶性肿瘤14例(占21.9%,14/64),其中黏液表皮样癌5例(5/14),其他类型少见腮腺恶性肿瘤共9例;术前双期增强CT诊断准确率为12/14。总体诊断准确率为87.5%(56/64)。良性腮腺肿瘤大多表现为边界清晰的瘤体,局部一般无淋巴结肿大,而恶性腮腺肿瘤则表现为边界模糊,有淋巴结肿大。良、恶性腮腺肿瘤在轮廓(有分叶/无分叶)、囊变(有/无)方面比较差异无统计学意义(n P>0.05)。腺淋巴瘤动脉期强化率高于多形性腺瘤和黏液表皮样癌(2.78 ± 0.90比1.69 ± 0.32和1.97 ± 0.64),实质期强化率低于多形性腺瘤和黏液表皮样癌(1.69 ± 0.56比2.13 ± 0.74和2.24 ± 0.50),差异有统计学意义(n P<0.05)。多形性腺瘤廓清率低于腺淋巴瘤和黏液表皮样癌(- 0.20 ± 0.15比2.34 ± 0.37和0.19 ± 0.07),黏液表皮样癌廓清率低于腺淋巴瘤(0.19 ± 0.07比2.34 ± 0.37),差异均有统计学意义(n P0.05). The arterial stage enhancement rate of adenolymphoma was higher than that of pleomorphic adenoma and mucoepidermoid carcinoma (2.78 ± 0.90 vs. 1.69 ± 0.32 and 1.97 ± 0.64), the parenchymal phaseenhancement rate was lower than that of pleomorphic adenoma and mucoepidermoid carcinoma (1.69 ± 0.56 vs. 2.13 ± 0.74 and 2.24 ± 0.50), and there were significant differences (n P<0.05). The clearance rate (CWR) of pleomorphic adenoma was lower than that of adenolymphoma and mucoepidermoid carcinoma(-0.20 ± 0.15 vs. 2.34 ± 0.37 and 0.19 ± 0.07), and the CWR of mucoepidermoid carcinoma was lower than that of adenolymphoma (0.19 ± 0.07 vs. 2.34 ± 0.37), and there were significant differences (n P<0.05).n Conclusions:Thedual-phase enhanced spiral CT scanning in the diagnosis of common benign and malignant parotid gland tumors is of great value.