新生儿鳃裂囊肿的CT与MRI表现

CT and MRI Diagnosis for Branchial Cleft Cysts of Newborns

目的探讨新生儿鳃裂囊肿的CT与MRI表现及鉴别诊断。资料与方法对13例经手术和病理证实的新生儿鳃裂囊肿的CT和MRI表现进行回顾性分析,并结合文献进行讨论。结果13例均为第2鳃裂囊肿。根据Bailey分型,Ⅰ型4例,Ⅱ型9例。CT与MRI表现为颈侧部圆形或椭圆形,壁薄、均质的囊性肿块,胸锁乳突肌受压向后或后外移位,颈动脉鞘内大血管向内或内后移位,颌下腺向前移位,囊壁强化的厚度取决于感染的程度。结论CT与MRI可定位、定性诊断鳃裂囊肿,其中"气-液征"是新生儿期鳃裂囊肿特有的征象。

Objective To discuss the CT and MRI appearance and differential diagnosis of branchial cleft cysts in newhorns. Materials and Methods The CT and MRI findings of 13 newborns with branchial cleft cysts proved clinically and pathologically were analyzed retrospectively. Results 13 cases were belong to second branchial cleft cysts, including Bailey type I in 4 cases and type 1I in 9 cases. Most second branchial cleft cysts usually appeared as painless and oval masses in the lateral portion of the neck adjacent anteromedial border of the sternocleidomastoid muscle at the mandibular angle. These cysts were typically well -circumscribed and homogeneous surrounded by a uniformly thin wall on CT and MRI. The enhancement of cyst wall depended on the degree of infection. Conclusion CT and MRI can make the diagnosis of branchial cleft cysts and the air - fluid level is imaging features of branchial cleft cysts in newborns.