【摘要】 目的:探讨BaileyⅡ型第二鳃裂囊肿在MRI上的特征表现,提高术前诊断的准确性。方法:回顾性分析11例经手术病理证实的第二鳃裂囊肿的MRI表现,其中6例行MRI增强扫描,总结其特征讨论其形成机制。结果:本组11例全部为BaileyⅡ型;MRI表现为薄壁、均质的囊性肿块,囊腔在T1WI上呈低、等、高信号(其中低信号7例,等信号2例,高信号2例),T2WI常呈等、高信号(等信号2例,高信号9例);DWI均呈等、高信号(等信号3例,高信号8例);囊壁强化或不强化,并发感染者囊壁增厚、强化;胸锁乳突肌受压向后外或向后移位,颈动脉间隙大血管向内或向后内移位,颌下腺受压移位;脂肪抑制序列可更清楚的显示病变与周围关系。结论:对于BaileyⅡ型鳃裂囊肿,磁共振图像具有明显的信号特征及部位特征,对术前及鉴别诊断有重要价值。更多还原

【Abstract】 Objective:To study the magnetic resonance imaging diagnostic value of the second branchial cleft cyst.Methods:Magnetic resonance imaging data of 11 cases of second branchial cleft cyst which were proven by surgery were retrospective analyzed,6 cases of the 11 cases were were performed enhancement magnetic resonance imaging,and the features and pathology were summarized.Results:All of 11 cases of type Ⅱ according to the Bailey’s type.Showed in the magnetic resonance image as homogeneous cystic masses with thin wall.The capsular space were typically hypointense(7 cases),isointense(2 cases) or hyperintense(2 cases) in Tl-weighed images and isointense(9 cases) or hyperintense(2 cases) in T2-weighed images and isointense(3 cases) or hyperintense(8 cases) in DWI and the image was hyperintense in DWI.There was enhancement or no enhancement in the cyst wall.The wall of the cyst and its peripheral soft tissue would be enhanced if accompanied with infection.Sternocleidomastoid was pressed to move toward lateral posterior or backward.Carotid arteries were pushed inward or inner-posterior and the submaxillary gland was also pushed by the cyst.Fat suppression images showed the relationship better between the cyst and its peripheral soft tissue.Conclusion:The magnetic resonance imaging of the second branchial cleft cyst were characteristic,there was the important value for the surgery and its differential diagnosis.更多还原