腮腺肿瘤的MSCT诊断

目的通过回顾性分析肿瘤形状、边界、密度的均匀性、增强效果等形态学征象,总结腮腺肿瘤的MSCT表现,探讨腮腺肿瘤的诊断与鉴别诊断价值。方法收集经手术证实的24例腮腺肿瘤的MSCT资料,与病理改变进行对照分析。MSCT同时行平扫和增强扫描。结果腮腺肿瘤大多位于腮腺浅叶(14/24),良性肿瘤以多形性腺瘤居多(13/19),MSCT表现为境界清楚、密度均匀的肿块。恶性肿瘤以粘液表皮样癌较多(4/5),MSCT多显示为境界不清、密度不均匀的肿块。转移癌以鼻咽部来源多见(1/5)。结论腮腺肿瘤在MSCT表现上有其各自特点,对绝大多数病例进行定性诊断是可能的。

Objective To investigate the value of MSCT in diagnosis and differential diagnosis of parotid tumour.Methods In all 24 cases of parotid tumours proved by surgery were enrolled.MSCT manifestations were comparatively studied with pathological findings.Plain and enhanced CT scan were performed in all cases.Results Most tumours of parotid gland were located in the shallow leaves（14/24）.Most benign tumors were mixed tumor（13/19）which manifested as masses with clear borders and even dense in MSCT;Mucoepidermoid carcinomas constituted the majority in malignant tumors of parotid gland,which showed as masses with obscure bounderies and various dense.Most metastases originated from nasopharyngeal carcinoma.Conclusion There are certain characteristics of parotid tumors on MSCT images,and these are helpful in determining the histological nature of the tumor.