腮腺腺淋巴瘤的MSCT诊断

MSCT diagnosis of the Warthin tumor in parotid gland

关键词:  腮腺  腺淋巴瘤  多层螺旋CT  增强

Key words:  parotid gland  Warthin tumor  MSCT  enhancement

摘要:

[目的] 分析35例经术后病理证实的腮腺腺淋巴瘤MSCT影像特征，探讨MSCT对腮腺腺淋巴瘤的诊断价值。 [方法] 回顾性分析经手术病理证实的腮腺腺淋巴瘤的MSCT检查资料，术前均行CT平扫和双期增强扫描。评价肿瘤的MSCT平扫和增强特征，包括肿瘤的数目、发生部位、大小及增强程度和方式。 [结果] 35例患者中28例为单发病灶，7例呈多发，多发病例中5例（14.29%）为双侧多发，2例为单侧多发。单发病灶集中在腮腺后下极，多发病灶分布较广泛。24个病灶（41.4%）出现囊变，10个有较大的囊变。平扫呈不均匀的等密度结节，增强肿瘤实质性部分动脉期显著强化，静脉期呈轻度强化，较动脉期明显减低。 [结论] 腮腺腺淋巴瘤MSCT增强表现为特征性的动脉期强化，静脉期退出，可伴有显著的囊变。MSCT对腮腺腺淋巴瘤术前诊断具有重要意义。

Abstract:

[Objective] To review MSCT imaging features of 35 cases of Warthin tumor in parotid gland and explore its diagnostic value. [Methods] Thirty-five patients with pathologically confirmed Warthin tumor underwent preoperative MSCT plain scan and dual-phase contrast scan. The imaging characteristics analysis included the number, position, size, density and the pattern of the enhancement of the focus. [Results] In all the 35 cases, 28 cases were solitary lesions and 7 cases were multiple lesions (in which, 5 cases were bilateral lesions). Most solitary lesions located in the inferior of the parotid gland, but multiple lesions located in the parotid gland widely. 24 lesions were cystic change. The tumors showed isodense nodule on CT plain-scan. After contrast administration, the solid component of the lesions showed marked enhancement in the arterial phase and it showed slight enhancement in the venous phase. [Conclusions] Warthin tumors showed heterogeneous isodense nodule on MSCT plain-scan, which showed a pattern of marked enhancement in arterial phase with characteristic cystic areas. Combined with clinical features, MSCT has an important diagnostic value in Warthin tumors.