腮腺基底细胞瘤的CT影像分析  

The CT imaging analysis of parotid basal cell

作　　者：陈超[1] 刘红宇[1] 汪国余[1] 谭恺[1] 

机构地区：[1]浙江省台州市中心医院放射科,浙江台州318000

出　　处：《医学影像学杂志》2016年第2期222-225,共4页Journal of Medical Imaging

摘　　要：目的探讨腮腺基底细胞瘤的CT影像特征。方法回顾性分析8例经手术、病理确诊的腮腺基底细胞瘤的临床和CT检查资料。结果本组8例均为单发肿瘤,均位于腮腺浅叶。病灶呈类圆形,边界光整、清晰,直径均〈2cm,CT平扫肿瘤实性部分与肌肉密度相仿,CT值约37-53HU,增强扫描肿瘤多呈明显强化,动脉期与静脉期强化幅度接近,仅1例呈薄壁环形轻度强化。3例强化均匀,5例强化不均匀,发生囊变,其中1例囊变范围超过60%,1例病灶内见裂隙状低密度区。免疫组化上皮细胞标志分化物全部阳性。结论腮腺基底细胞瘤具有一定的CT影像特点,结合发病年龄和临床资料可提高术前诊断准确率,最终确诊需依靠病理学。Objective To review CT imaging features of basal cell tumor in parotid gland and to explore its diagnostic value.Methods The clinical materials and image findings of 8 cases of parotid basal cell tumor,which were proved by pahtology,were retrosoectively studied. Results Each of the 9 patients had only 1 tumor. All the lesions were located in the superficial lobe. All cases appeared as round and were well circumscribed with smooth contours. All cases were less than 2 cm in diameter. CT scan showed the true nature of tumors was similar to muscle density with CT value about 37 - 53 HU. At enhanced scanning phase,most tumors showed a strong enhancement,the arterial phase of enhanced amplitude was closed to the venous. Only 1 case showed thin-walled annular longitudinal enhancement. 3 cases showed homogeneous enhancement,and 5 cases showed inhomogeneous enhancement with occuring cystic change. Cystic change range in 1 case exceeded 60%,and 1 case was seen in the slit shaped low density area. Immunohistochemistry showed tumor epithelial cell markes were all positive. Conclusion The parotid basal cell adenoma presents certain CT features. Combining age with onset and clinical data can improve the preoperative diagnostic accuracy.However,the definite diagnosis should be depended on the histopathological and immunohistochemical results.

关 键 词：基底细胞瘤 体层摄影术 X线计算机 

分 类 号：R739.87[医药卫生—肿瘤] R814.42[医药卫生—临床医学]