Let's take a look at the 26W+3D four-dimensional abnormal B-ultrasound, thank you!

Fetal development is normal, amniotic fluid and fetal heart are normal.

No harelip, normal spine. All organs are normal, and there is no umbilical cord around the neck.

Mainly talk about fetal ventricle. The cistern of posterior cranial fossa has no obvious enlargement, the midline of the brain is centered and the lateral ventricle is not wide.

This result is normal. The widening of lateral ventricle in fetal development is not necessarily hydrocephalus, but most of it can be absorbed by itself in the third trimester of pregnancy. From the numerical point of view, your baby has not widened significantly, so don't worry.

Explain in detail:

Fetal lateral ventricle below 1 cm should be normal, 1 to 1.5 cm is considered mild, and 1.5 cm is abnormal. Hydrocephalus refers to the excessive accumulation of cerebrospinal fluid in the ventricular system, the expansion of the lateral ventricular system, the increase of pressure, and the widening of the ventricle by ultrasound. Generally, the triangular area of lateral ventricle is widened to 1.5 cm, indicating that the ventricle is enlarged, and the wider it is, the heavier it is. If the triangle 1.2 ~ 1.4 cm wide and choroid plexus accounts for more than 50% of the ventricle, it is generally considered normal. If choroid plexus shrinks and hangs, hydrocephalus is considered to exist.

During the rapid growth period, the fetal brain sometimes develops faster than the aqueduct system in the brain. When the amount of cerebrospinal fluid produced in the brain is obviously greater than the circulation capacity of the aqueduct system, there will be a slight expansion of the ventricular system. If the time of B-ultrasound examination happens to be in this period, the examination results can not be used as the exact diagnosis basis of hydrocephalus. Because this slight expansion will gradually disappear with the development and perfection of aqueduct system in the brain. When hydrocephalus is obvious, it often shows that one side or all of the brain is filled with fluid. If there is no obvious abnormality in the development of other brain tissues, and the TORCH series examination has not found any abnormality, waiting is the only choice.

There are many reasons for hydrocephalus, besides excessive cerebrospinal fluid production, there are also absorption disorders or midbrain aqueduct blockage. The sequelae of some diseases, such as intracranial hemorrhage and infection, can lead to hydrocephalus, which may occur at any time during pregnancy. Therefore, even if the brain develops normally in the second trimester, hydrocephalus may occur in the third trimester. Therefore, ultrasound examination during pregnancy is very necessary. In addition, some cases may be mistaken for hydrocephalus. Experienced ultrasound doctors will make an informed diagnosis by comparing relevant factors, and mild abnormalities found during pregnancy can be accurately diagnosed through dynamic observation.

Widening of lateral ventricle is mostly caused by excessive cerebrospinal fluid of fetus, and most of fetus can absorb it by itself in the later stage. Do a B-ultrasound every few weeks to see if it will continue to widen. Another point is that the lateral ventricle is widened too much, and doctors will suspect hydrocephalus. In addition to the widening of the ventricle, there is also an obvious accompanying symptom of hydrocephalus, so please ask a doctor to help you see if the fetus has spina bifida when doing B-ultrasound, otherwise the fetus should be healthy.

At present, many fetal lateral ventricles are widened 10- 15mm, and they are still very healthy at birth!