Width of the fetal lateral ventricular atrium between 10 and 12 mm: a simple variation of the norm?

When MVM is observed on prenatal ultrasound examination it can be very difficult to offer parents appropriate counseling. It is important to exclude aneuploidy or morphological abnormalities but even then there will be anxieties about long-term neurological outcome. Our data, which show normal neurodevelopment between 18 months and 10 years after birth in cases of MVM (10-12 mm), should provide a basis for reassuring counseling.