MRI对胎儿骶尾部畸胎瘤的评价

郭丽波; 张军

中国临床医学影像杂志 ›› 2013, Vol. 24 ›› Issue (07) : 493-495.

论著

MRI对胎儿骶尾部畸胎瘤的评价

郭丽波，张军

作者信息 +

MRI evaluation of fetal sacrococcygeal teratoma

GUO Li-bo, ZHANG Jun

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文章历史 +

摘要

目的：探讨产前MRI诊断胎儿骶尾部畸胎瘤的影像学表现及价值。资料与方法：回顾性分析我院2009年12月—2012年1月经超声检查怀疑胎儿骶尾部肿块，并进行MR检查的7例有完整临床及影像学资料的孕妇，孕妇年龄21～33岁，孕龄24～37周+5，分析病变的大小、位置、形态、信号特征、与相邻组织的关系。结果：MRI诊断的7例胎儿骶尾部畸胎瘤，其中囊性6例，囊实混合性1例，MR影像学特征表现为胎儿骶尾部（向体腔内或者向体腔外）突出的大小不等包块，病变边界光滑，大小约为0.65 cm×0.5 cm～8.8 cm×8.1 cm，均匀长T1长T2信号为主，其中2例内伴分隔，2例向骨盆或腹腔内延伸。上述病例均由随访或产后病理结果得到证实。结论：胎儿骶尾部畸胎瘤具有特征性的MRI表现，MRI能明确诊断胎儿骶尾部畸胎瘤。

Abstract

Objective: To analyze the MRI characteristics of fetal sacrococcygeal teratoma and to determine the value of prenatal MRI. Materials and Methods: From December 2009 to January 2012, 7 cases suspected of having fetal sacrococcygeal tumors by ultrasound, MRI was performed in all of the cases. Pregnant women aged 21~33 years, with the gestational age of 24 weeks to 37 weeks+5, the size, location, signal characteristics, and compressive effects of the masses were determined. Results: The sacrococcygeal teratoma appeared entirely cystic in six fetuses, mixed cystic and solid in 1, type Ⅰ in two patients, type Ⅱ in 2, and type Ⅲ in 1, type Ⅳ in 2, MRI findings of fetal sacrococcygeal teratomas were as follows: fetal sacrococcygeal region tumors with low T1 high T2 signal intensity, the sacrococcygeal teratomas with septa in two, intrapelvic and intraabdominal extent of the tumor in two. which was proved by follow-up or pathologic findings. Conclusion: Fetal sacrococcygeal teratomas had characteristic MR imaging appearances.