At 11-13 weeks, fetuses with DWM have measurable abnormalities in the posterior brain. An abnormal appearance of the fourth ventricle-cisterna magna complex was present in all four cases of DWM.

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Objectives To establish values of fetal left brachiocephalic vein (LBCV) dimensions during normal pregnancy and determine whether routine assessment of the LBCV may help in identifying fetuses with congenital abnormalities of this vessel. Methods

An intrathymic LBCV is a common condition and appears to be a normal variant in the fetus. The prevalence of a LSVC in our screening population was similar to that reported in previous studies. Anomalous courses of the LBCV are seen occasionally in cases with cardiac malformation. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.

The CSP is a structure routinely evaluated in screening ultrasound. A wide CSP is found in second trimester fetuses with del. 22q11. A dilated CSP may be an important sonographic marker for the presence of del. 22q11 along with conotruncal malformations and thymic hypoplasia. © 2016 John Wiley & Sons, Ltd.