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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。
Objective To analyze CT features of parotid benign and malignant tumors and the main points of differential diagnosis. Methods From January 2008 to October 2013, 35 cases of parotid benign or malignant tumor confirmed by pathology were collected to analyze the features of CT scan and enhancement in different types of tumors. Results The correct rate of CT diagnosis was 84.6% in 26 cases of benign tumors and 88.9% in 9 cases of malignant tumors. Parotid benign tumor morphology rules, the edge clear to the parotid more common, enhanced benign pleomorphic adenoma is slowly continued to strengthen, adenolytic lymphoma early strengthening, rapid outflow, basal cell tumor for the early sustained enhancement, and will not infringe Peripheral tissue and lymph nodes. Irregular shape of the tumor, unclear margin, often involving the deep leaves or deep, shallow two leaves, increased delay was enhanced, often violations of surrounding tissues and lymph nodes. Conclusion CT scan can help diagnose benign and malignant parotid tumors before surgery in head and neck surgery and has high value in tumor location, morphology and surrounding tissues.