儿童颈肩部淋巴管瘤的MRI表现

目的:探讨儿童颈肩部淋巴管瘤的MRI影像表现,以加深对该疾病的认识.方法:26例经手术病理证实的淋巴管瘤MRI数据纳入回顾性研究,分析病灶的部位、结构形态与边缘、信号特征以及增强表现等.结果:病灶全部位于组织间隙内,其中80.8%位于肌间隙内,其余位于皮下间隙.病变由多个囊性结构构成,可以分为单囊为主型(55%)和多囊型(45%),25例病灶内有分割,88.5%的病灶形态不规则.87%的病灶T_1WI呈等低信号且不均匀,全部病灶在T_2WI呈高信号,多囊者各囊内信号可不同.增强后半数有分隔强化.结论:儿童颈肩部淋巴管瘤典型MRI表现是位于组织间隙内的、不规则的多囊性病灶,呈长T_1长T_2信号,常有分隔,分隔可强化或不强化,不同的囊内信号可不同.

MR Findings of Lymphangioma of Neck and Shoulder in Children

Purpose: To evaluate the MR features of child' s lymphangioma in the neck and shoulder in order to emphasize the recognition. Methods: Twenty- six patients with histologically confirmed lym-phangioma in the neck and shoulder were enrolled in our retrospective study. The site, structure, shape, margin, signal intensity and enhancement of the lesions were evaluated. Results: All the lesions were located in the tissue spaces and 80.8% of the lesions grew alongside the space between the muscles and others subcutaneously. The lesion were multicystic and could be classified into mono - cystic predominant type (55%) and multi - cystic predominant type (45%). The septum was seen in 25 patients and the ir-regular shape was seen in 88.5% of them. The lesions were iso - or hypo - intensity on T_1 WI (87%) and hyper- intensity on T_2WI (100%) . The different cysts in the same lesion would have different signals. The septum enhancement was seen in half patients.Conclusion: The typical MR finding of lymphan-gioma of neck and shoulder in children was the irregular multicystic lesion which grew between the muscles or subcutaneously. The cysts had long T_1, long T_2 signal, and might have different intensity in the same lesion. The septttm was commonly seen and could be enhanced.