Hachisuga Masahiro, Tsukimori Kiyomi, Hojo Satoshi, Hidaka Nobuhiro, Yoshimura Takazumi, Masumoto Kouji, Taguchi Tomoaki, Wake Norio
Department of Gynecology and Obstetrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Fetal Diagn Ther. 2008;24(3):177-81. doi: 10.1159/000151334. Epub 2008 Aug 28.
Prenatal sonographic findings of lymphangiomas characteristically appear as thin-walled, multiseptate hypoechogenic masses. In our case, a retroperitoneal hypoechogenic mass was detected at 26 weeks of gestation by sonography. Serial sonographic examinations demonstrated multiple septations at 29 weeks of gestation, which in retrospect was a classical finding of retroperitoneal lymphangioma. MRI at 38 weeks of gestation revealed a multilocular mass, which was homogeneous, low on T1-weighted and high on T2-weighted images, in the left retroperitoneal cavity. These findings were compatible with the diagnosis of a lymphangioma. This case shows the change in characteristic imaging features, from a unilocular to multilocular pattern, of a lymphangioma with regard to gestational age. It is important to observe the size and extension of such tumors in order to determine the prospect for neonatal prognosis, as well as to make decisions on the delivery timing and style.
淋巴管瘤的产前超声检查结果特征性地表现为薄壁、多分隔的低回声肿块。在我们的病例中，妊娠26周时通过超声检查发现一个腹膜后低回声肿块。系列超声检查显示妊娠29周时有多个分隔，回顾来看这是腹膜后淋巴管瘤的典型表现。妊娠38周时的磁共振成像（MRI）显示左腹膜后腔有一个多房性肿块，在T1加权像上呈均匀低信号，在T2加权像上呈高信号。这些表现符合淋巴管瘤的诊断。该病例显示了淋巴管瘤随孕周变化的特征性影像学特征，从单房模式转变为多房模式。观察此类肿瘤的大小和范围对于确定新生儿预后前景以及决定分娩时机和方式很重要。
