What is dilated lateral ventricles?

Ventriculomegaly. From Wikipedia, the free encyclopedia. Ventriculomegaly is a brain condition that mainly occurs in the fetus when the lateral ventricles become dilated. The most common definition uses a width of the atrium of the lateral ventricle of greater than 10 mm. This occurs in around 1% of pregnancies.Click to see full answer. Considering this, what causes dilated ventricles in the brain?Hydrocephalus is the term used when enlargement of the ventricles has been caused by an increase in the pressure of the cerebro-spinal fluid (CSF) within them. Without signs of increased pressure in the brain (hydrocephalus), ventriculomegaly most likely will not cause any problems.Similarly, can mild Ventriculomegaly go away? Ventriculomegaly will significantly worsen in approximately 2-5% of cases. In many fetuses, particularly those with borderline ventriculomegaly, the condition will resolve spontaneously resulting in a normal outcome. The major factor that influences prognosis is the presence of associated abnormalities. Also to know is, what is the normal size of lateral ventricles? The lateral ventricles usually measure less than 10 mm (about ½ inch) each. Mild ventriculomegaly means that one or both of the baby’s lateral ventricles are slightly larger than usual. Ventricles measuring between 10 to15 mm are called “mild” ventriculomegaly.Can enlarged brain ventricles be normal?Hydrocephalus ex-vacuo occurs when a stroke or injury damages the brain and brain matter actually shrinks. The brain may shrink in older patients or those with Alzheimer’s disease, and CSF volume increases to fill the extra space. In these instances, the ventricles are enlarged, but the pressure usually is normal.