Hashimoto I, Tada K, Nakatsuka M, Nakata T, Inoue N, Takata M, Kudo T, Joja I
Department of Obstetrics and Gynecology, Okayama University Medical School, Okayama, Japan.
Fetal Diagn Ther. 1999 Jul-Aug;14(4):248-53. doi: 10.1159/000020931.
Although fetal hydrocephalus is commonly detected by prenatal ultrasonographic examination, posthemorrhagic hydrocephalus has rarely been observed in the fetus. We report a case of hydrocephalus secondary to intraventricular hemorrhage (IVH) diagnosed by in utero magnetic resonance imaging (MRI) at 37 + 1 weeks of gestation. Ultrasonography revealed enlargement of the bilateral ventricles and an irregular mass measuring 20 x 12 x 10 mm in the right lateral ventricle. T1-weighted images with two-dimensional fast low-angle shot (2D-FLASH) and T2-weighted images with half-Fourier single-shot turbo spin echo (HASTE) demonstrated that an old hemorrhagic clot existed in the right lateral ventricle of the fetus. Hydrocephalus secondary to IVH was confirmed by postnatal MRI and ventriculoscopy. Fast MRI is especially useful for prenatal diagnosis of fetal brain abnormalities because it minimizes the artifact of fetal movement.
虽然胎儿脑积水通常通过产前超声检查发现，但胎儿期很少观察到出血后脑积水。我们报告一例妊娠37 + 1周时经宫内磁共振成像（MRI）诊断为继发于脑室内出血（IVH）的脑积水病例。超声检查显示双侧脑室扩大，右侧脑室内有一不规则肿块，大小为20×12×10 mm。采用二维快速低角度激发（2D-FLASH）的T1加权图像和半傅里叶单次激发快速自旋回波（HASTE）的T2加权图像显示，胎儿右侧脑室内存在陈旧性血凝块。产后MRI和脑室镜检查证实为IVH继发的脑积水。快速MRI对胎儿脑异常的产前诊断特别有用，因为它能将胎儿运动伪影降至最低。
