Objective To analyze the differential diagnosis points of parotid tumors with CT. Methods 35 pathologically confirmed cases of parotid tumor were selected from January, 2008 to September, 2013. The performance characteristics in CT were analyzed to determine whether benign or malignant and compare with pathologic findings. Results CT diagnosis correspondence rate in benign tumor was 84.6% while malignant tumor was 88.9%. The performance of parotid tumors in CT was as following: most benign tumors were in the superficial lobe, most shapes were regular, boundaries were clear, and with no invasion and lymph node metastasis; while malignant tumor involved in the deep lobe or cross depth-superficial two leaves, the shape was irregular, boundary was not clear, and with invasion and lymph node metastasis. Conclusion CT had high value in differentiate diagnosis of parotid tumor based on the CT features of location, shape, border area and invasiveness images and provide important image information before surgery.%目的：分析腮腺良恶性肿瘤的CT特征及鉴别诊断要点。方法收集2008年1月-2013年10月经病理证实的35例腮腺良性或恶性肿瘤影像学资料，分析不同性质肿瘤的CT平扫及增强特征。结果26例良性肿瘤CT诊断正确率为84.6%，9例恶性肿瘤CT诊断正确率为88.9%。腮腺良性肿瘤形态规则，边缘清晰，以腮腺浅叶多见，增强后良性多形性腺瘤为缓慢持续强化，腺淋巴瘤为早期强化、快速流出，基底细胞瘤为早期持续强化，且不会侵犯周围组织及淋巴结。恶性肿瘤形态不规则，边缘不清，常累及深叶或深、浅两叶，增强后呈延迟持续强化，常侵犯周围组织及淋巴结。结论 CT 扫描可在头颈外科术前辅助诊断腮腺肿瘤良恶性，在肿瘤位置、形态、累及周围组织方面具有较高价值。
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