胎儿纵隔型支气管源性囊肿的MRI诊断(3例报道并文献复习)

MRI diagnosis of fetal mediastinal type bronchogenic cyst(report of 3 cases and literature review)

目的探讨胎儿纵隔型支气管源性囊肿在产前MRI上的特点。方法对3例手术病理证实的胎儿纵隔支气管源性囊肿的产前MRI特点结合产后CT表现进行分析,并复习文献总结胎儿纵隔支气管源性囊肿的产前MRI诊断与鉴别诊断。结果胎儿纵隔支气管源性囊肿多为单发,类圆形,边界清楚的囊性肿块,少数可呈分叶状或不规则形,多与气管支气管关系密切。鉴别诊断包括食管重复囊肿、淋巴管瘤、神经肠源性囊肿等。结论胎儿纵隔型支气管源性囊肿的MRI表现具有一定的特征性,有利于其产前MRI诊断。

Objective To evaluate the features of fetal mediastinal type bronchogenic cyst on prenatal MRI. Method The prenatal MR images and postnatal CT images of 3 cases with mediastinal type bronchogenic cyst confirmed by pathology were analyzed retrospectively. The characteristics of MRI diagnosis and differentiation diagnosis were summarized through literature review. Results The fetal mediastinal type bronchogenic cyst on MRI was usually shown as a single, round-like, well-defined cystic mass, some had the lobulated or irregular shape. Most of them closely attached to trachea and bronchus. The differentiation diagnosis included esophageal cyst, lymphangioma, enterogenous cyst, etc. Conclusions Fetal mediastinal type bronchogenic cysts have characteristic MRI features, which favor their prenatal diagnosis.