腮腺少见良性肿瘤的CT诊断分析  

The CT diagnostic analysis of rare benign tumor in parotid gland

作　　者：肖芳 王朋 刁强 金玉玲 叶刚 XIAO Fang;WANG Peng;DIAO Qiang;JIN Yu-ling;YE Gang(Department of Radiology,The First Affliated Hospital of USTC,Division of Life Sciences and Medicine,University of Science and Technology of China,Hefei 230036,Anhui,China)

机构地区：[1]中国科技大学附属第一医院(安徽省立医院)影像中心,合肥230036

出　　处：《医学研究生学报》2020年第9期952-956,共5页Journal of Medical Postgraduates

基　　金：“中国科技大学新医学”联合基金(WK9110000115)。

摘　　要：目的目前国内外对腮腺少见良性肿瘤的影像学文献报道较少。文中旨在分析腮腺少见良性肿瘤的CT表现特征,以提高影像诊断水平。方法回顾性分析2015年12月至2020年1月中国科技大学附属第一医院耳鼻喉科及口腔科45例经病理学证实为腮腺少见肿瘤的患者CT资料。均行CT平扫及增强扫描,包括基底细胞瘤24例、肌上皮瘤4例、淋巴上皮囊肿8例、表皮样囊肿3例、神经鞘瘤2例、静脉型血管瘤2例、嗜酸性细胞瘤及脂肪瘤各1例。分析腮腺少见肿瘤CT表现特点。结果基底细胞瘤CT显示主要发生于浅叶、单发、形态规则、边界清晰、易出现囊变;CT增强主要表现为动脉期中重度强化,静脉期略强化程度减退。淋巴上皮囊肿患者主要发生于浅叶、单发、边界清楚,囊性结节伴有薄壁;CT增强主要表现薄壁轻度强化。肌上皮瘤患者CT显示主要发生于浅叶、单发、形态不规则、出现囊变、无钙化;CT增强主要表现边缘结节状明显强化,静脉期强化范围扩大,向中心逐渐强化。基底细胞瘤与非基底细胞瘤之间强化特点的差异有统计学意义(P<0.05),中重度强化比例大于非基底细胞瘤(P=0.000)。结论腮腺少见良性肿瘤多单发于浅叶,易囊变,具有良性肿瘤的特征,特别是中重度强化特点有助于临床鉴别诊断及提高诊断率。Objective There are not many CT analysis regarding Parotid gland rare benign tumor. We intend to analyze the clinical characteristics of parotid gland rare benign tumors and CT performance characteristics in order to improve the imaging diagnosis level. Methods Forty-five CT materials from pathological confirmed patients with parotid gland rare benign tumor, from Dec. 2015 to Jan. 2020 were collected. All patients had CT plain scan and enhanced scan. There are 24 cases of basal cell tumor, 4 cases of myoepithelioma, 8 cases of lymphoepithelial cyst, 3 cases of epidermoid cyst, 2 cases of schwannoma, 2 cases of venous hemangioma, 1 case of oncocytoma and 1 case of lipoma. The relationship between CT signs and pathological types of parotid rare tumors were analyzed.Results CT indicated that Basal cell tumor usually are single occurred at parotid gland at superficial lobe, with clear boundary, easy to cystic change, and rare calcification. Enhanced CT indicated moderate to severe arterial enhancement, with slightly enhanced venous phase decrease. Myoepithelioma usually appear at single superficial lobe, clear boundary, easy to cystic change, obvious and centripetal enhancement in arterial phase. Lymphoepithelial cyst and epidermoid cyst are single superficial cystic lesions, usually irregular shape, easy to cystic change, no calcification with clear boundary. CT enhancement of Lymphoepithelial cyst showed with thin wall slightly strengthened. CT enhancement of epidermoid cyst showed with visibly enhanced marginal nodules. The scope of venous phase enhancement was enlarged, gradually strengthening towards the center. The difference of enhancement features was statistically significant in distinguishing basal cell tumor from other rare benign parotid tumors(P<0.05). Enhancing ratio is greater than that in Non-basal cell tumor(P=0.000). Conclusion Benign tumors of the parotid gland are rare. Most of them are solitary in the superficial lobe and with the characteristics of benign tumors,easy to cystic change, especially

关 键 词：腮腺 良性肿瘤 CT 

分 类 号：R739.81[医药卫生—肿瘤]