Ventriculomegaly

[3] Enlargement of the ventricles may occur for a number of reasons, such as loss of brain volume (perhaps due to infection or infarction), or impaired outflow or absorption of cerebrospinal fluid from the ventricles, called hydrocephalus or normal pressure hydrocephalus associated with conspicuous brain sulcus.

The interventricular foramen may be congenitally malformed, or may have become obstructed by infection, hemorrhage, or rarely tumor, which may impair the drainage of cerebrospinal fluid, and thus accumulation in the ventricles.

[citation needed] This diagnosis is generally found in routine fetal anomaly scans at 18–22 weeks gestation.

[6] Ventriculomegaly associated with abnormal findings and other structural malformations, often has an adverse prognosis, which ranges from disability (often mild) to death.

[9] Although evaluation of lateral ventricles dimensions is decisive for establishing a diagnosis of ventriculomegaly, the shape of the ventricular system, including that of the frontal horns, is also important.