颈部囊性病变的多排螺旋CT和MRI影像学特征分析

目的：分析颈部囊性病变的多排螺旋CT和MRI影像学特征。方法回顾性分析41例经病理证实的颈部囊性病变的解剖部位及多排螺旋CT和MRI影像学征象。结果颈部囊性病变多形状规则，边界清晰。20例甲状舌管囊肿位于正中线舌骨水平或略偏，与甲状软骨关系密切，MRI征象为长 T1长 T2信号，信号均匀，增强扫描囊壁轻度强化；11例第二腮裂囊肿位多于胸锁乳突肌前内侧，MRI为囊性长T1长T2信号，信号均匀，囊肿内CT值为水样密度，增强扫描囊壁轻度强化；2例表皮样囊肿位于颈中线舌骨水平、颈后部，CT扫描密度均匀，增强未见明显强化；4例会厌囊肿位于会厌前间隙内，MRI影像为囊性长T1长T2信号肿块，信号均匀，CT影像为囊性薄壁低密度肿块，密度均匀；4例淋巴管瘤主要位于颈后三角区，MRI肿块呈等T1长T2信号，内部可见分隔，囊腔大小不等，增强扫描其分隔可见强化。结论颈部不同囊性病变的解剖位置和影像学征象有一定的特点，经过综合分析，可以做出正确诊断。

Multipie-slice spiral CT and MRI imaging features of cervical cystic lesion

Objective To analyze multipie-slice spiral CT and MRI imaging features of cervical cystic lesion .Methods We retrospectivly reviewed the images finding of totally 41 cases of cervical cystic lesions with pathology confirmed .Results Most of the cases were well-defined and normal-shaped .Twenty of them were theroglossal duct cyst located along or drift to the midline of the neck at the level of hyoid bone ,which were near the thyroid gland .In the MRI ,the lession was shown homogeneouse hypointence on T1-weighted image and hyperintence T2-weighted image ,and enhanced MRI showed slight enhanced sign of cystic wall ,eleven of them were second branchial cysts anterior sternocleidomastoid mus-cle ,which showed homogeneouse hypointence on T1-weighted image and hyperintence T2-weighted image ,on CT image was a hypotense mass similar to that of water ,of which the cystic wall was enhanced .Two cases were epidermoid cyst located in the level of hyoid bone at posterior neck ,on CT image ,the mass was shown homogeneouse density without enhancement .Four cases of epiglottic cysts protruded at the preepiglottic space ,which appeared homogeneously hypointence on T1-weighted image and hyperintence on T2-weighted image ,and occured as homogeneouse low density mass with thin wall on non-enhanced CT .Four of them were lymphangioma at posterior trigone of neck ,the lession was shown separationisointensity on T1-weightd image and hyperintence T2-weighted image ,with separation and multiple cyst in different size ,on contrast MRI they shown were separation enhancement .Conclusion According to the location and typical imaging appearance ,multipie-slice spiral CT and MRI can do the correct diagnosis in the cervical cystic lesion .