腮腺基底细胞腺瘤的增强CT特征  

CT enhancement features of basal cell adenoma in parotid gland

作　　者：杨军[1] 廖承德[1] 李勤勍 飞勇[1] 杨光军[1] 

机构地区：[1]云南省肿瘤医院(昆明医科大学第三附属医院)放射科,昆明650118

出　　处：《中华临床医师杂志（电子版）》2015年第3期72-75,共4页Chinese Journal of Clinicians(Electronic Edition)

摘　　要：目的探讨腮腺基底细胞腺瘤的CT表现,尤其是增强特征以及鉴别诊断。方法回顾性分析经病理证实9例腮腺基底细胞腺瘤的CT表现:9例均行CT平扫和增强扫描;观察病灶形态学特征及强化方式,测量肿瘤平扫及双期增强CT值,计算净强化值,并与16例多形性腺瘤和16例腺淋巴瘤进行对照分析。结果腮腺基底细胞腺瘤CT平扫均表现为腮腺内单发的类圆形病灶,边界清楚,呈均匀的稍高密度,平均CT值约(38.2±9.1)HU,与多形性腺瘤及腺淋巴瘤的平扫CT值相比无统计学差异(P>0.05)。增强扫描,肿瘤实质部分呈明显强化,动脉期净强化值约(54.9±8.6)HU,静脉期强化程度持续增加,净强化值约(63.0±10.7)HU。动脉期:肿瘤实质部分的强化程度高于多形性腺瘤(P<0.01),但与腺淋巴瘤无统计学差异(P>0.05);静脉期:肿瘤实质部分的强化程度均高于多形性腺瘤及腺淋巴瘤(P<0.01)。结论腮腺基底细胞腺瘤的CT表现为腮腺单发病灶,多发生于浅叶,边缘规则,增强扫描明显强化,且呈"快进慢出"持续、渐进性强化特点。Objective To investigate the CT appearances, especially the enhancement features of basal cell adenoma （BCA） in parotid gland, and the differential diagnosis of this disease. Methods All the 9 cases received plain and enhanced CT scanning, and the CT imaging findings of 9 patients with BCA confirmed by pathology after surgical resection were analysed retrospectively. The morphology features and the enhancement way were studied. The size of the BCA and the CT value which in the same area of lesion in plain scan and double phase enhanced CT were measured and compared with those of pleomorphic adenoma （n=16） and adenolymphoma （n=16） in the same period. Net enhancement （NE） CT value on tumor was calculated. Results Basal cell tumors showed a solitary round or oval nodule or mass with clear boundary and high density on CT plain-scan. At dual-phase scan, basal cell tumors showed a pattern of persistently strong enhancement： At arterial phase, the （NE） CT value （54.9±8.6）HU was statistically different from the pleomorphic adenoma, but had no statistical difference compared with adenolymphoma （P〈0.01）. At venous phase, the （NE） CT value （63.0±10.7）HU was statistically different from the other two tumors （P〈0.01）. Conclusion The CT features of BCA in parotid gland include a solitary nodule or mass with a well boundary, more be seen in the superficial lobe; the lesion is enhanced obviously and continuously.

关 键 词：腮腺肿瘤 肿瘤 基底细胞 腺瘤 体层摄影术 X线计算机 

分 类 号：R739.8[医药卫生—肿瘤]