小儿淋巴管瘤的MRI诊断

目的分析小儿淋巴管瘤的磁共振表现及其病理基础。方法对６例经手术病理证实的、年龄７天至７岁的小儿淋巴管瘤患者的磁共振表现进行回顾性分析。结果淋巴管瘤磁共振表现为Ｔ１ＷＩ上呈与肌肉相似或稍高的信号，Ｔ２ＷＩ上高于脂肪信号。５例瘤内可见低信号分隔，１例瘤内见血管流空影，３例见明显包膜，３例边界不清。２例病理诊断为海绵状淋巴管瘤，４例诊断为囊状淋巴管瘤。结论磁共振成像可较好地显示肿瘤的大小、形态及范围，从而指导手术治疗。

MR imaging diagnosis of lymphangiomas in children

Purpose To analyze the MR manifestations of MRI lymphangioma in children and its pathologic correlation. Methods The MR manifestations of six cases of proven lymphangioma proved surgically and pathologically were analyzed retrospectively. The age ranged from 7 days to 7 years. Results The signal intensity was similar to or slightly higher than that of muscle on T 1 weighted image and greater than that of fat on T 2 weighted image. Five cases had visible septations of low signal intensity. One case showed signal void with in the tumor mass. Capsule was seen clearly in 3 cases whereas in the other 3 cases, the tumor was not clearly demarcated. Two cases were pathologically diagnosed as cavernous lymphangioma, and four cases cystic lymphangioma. Conclusion The information obtained with MR imaging can finely display the size, shape and extent, of the tumur and help in planning surgery.