Oh, sometimes it feels overwhelming to think about the illnesses our babies may suffer from, doesn't it? Especially, some conditions that we learn about while the baby is still in the womb are very complex and difficult to understand. Today we are going to talk about a serious brain condition that is very rare, but important to know about. This is called hydranencephaly.
What exactly is Hydranencephaly?
Simply put, hydranencephaly is a rare neurological condition that occurs at birth. In this condition, two very important parts of the baby's brain, called the cerebral hemispheres , do not form. Think about it, the largest part of our brain is the cerebrum. That's where these two hemispheres are located. Thinking, remembering, and feeling are all controlled by these cerebral hemispheres.
So, in the head of a baby with hydranencephaly, where the cerebral hemispheres should be, there are sacs filled with cerebrospinal fluid (CSF) . This cerebrospinal fluid (CSF) is actually the fluid that surrounds and protects our brain and spinal cord. But in this case, something different happens.
Over time, these babies' heads start to grow larger. Also, other serious symptoms may appear. Sadly, this condition often results in the baby dying shortly after birth, even if it is not in the mother's womb.
What is the difference between Hydranencephaly and Hydrocephalus?
You may have heard of a condition called hydrocephalus. Both of these conditions involve an enlarged head and an accumulation of cerebrospinal fluid (CSF). But these two conditions are very different.
Hydrocephalus is a condition in which the fluid inside the brain, called cerebrospinal fluid (CSF), builds up, causing increased pressure inside the skull. This can cause brain damage. It can be present at birth, or it can develop after an accident or illness. Sometimes, hydrocephalus can also occur as a symptom of a condition called hydranencephaly.
But in hydranencephaly, the brain doesn't develop properly while the baby is still in the womb. That means that fewer parts of the brain develop.
It is important to distinguish between these two conditions, as the treatments and prognosis are very different. Many babies with hydrocephalus can recover if properly diagnosed and treated. However, babies with hydranencephaly usually do not.
So what's the difference between this and holoprosencephaly?
This is another different type of brain development disorder. In holoprosencephaly , the front part of the baby's brain (forebrain), the cerebral hemispheres mentioned earlier, do not divide. That is, instead of two parts, they are one. In hydranencephaly, however, those hemispheres are completely absent.
Depending on the severity of the condition, some babies with holoprosencephaly may survive after birth.
How common is this condition, Hydranencephaly?
This is a very rare condition. Scientists estimate that this condition affects about one in 10,000 pregnancies, or one in 5,000. That's very low.
Why does hydranencephaly occur? What are the causes?
In fact, scientists still don't know exactly what causes hydranencephaly. It's possible that it's hereditary, but there's no clear understanding of how it happens.
However, in some cases, this condition has been found to be linked to maternal exposure to toxins during pregnancy . Therefore, extreme caution should be exercised during pregnancy.
What are the symptoms of this condition?
When a baby with hydranencephaly is born, it may look like a normal baby for the first few days. Therefore, it may be difficult to recognize it right away. Symptoms begin to appear within the first few weeks or months of life. Here are some of the symptoms that may appear:
- Failure to thrive means the baby is not gaining weight or developing properly .
- Muscle stiffness may increase or decrease, as well as muscle twitching .
- The head is larger than normal.
- Difficulty seeing and hearing .
- Stiffness in the limbs.
- Difficulty breathing .
If you have one or more of these symptoms, it is very important to seek medical advice immediately.
How is Hydranencephaly diagnosed?
This condition can sometimes be detected before the baby is born, that is, during an ultrasound scan . As you know, an ultrasound scan creates an image of the baby in the mother's womb. Then, it can be seen that the baby's cerebral hemispheres are missing.
If a prenatal ultrasound suggests hydranencephaly, the doctor may order an MRI to obtain clearer images.
However, sometimes it is not recognized during pregnancy and the condition can persist after the baby is born. In that case, it can take weeks or even months to diagnose the condition. Because, as mentioned earlier, the baby may appear normal at first.
A doctor can confirm the condition based on the baby's symptoms and an MRI of the brain. An MRI can help distinguish hydranencephaly from other conditions, such as hydrocephalus and holoprosencephaly, which were previously discussed.
In addition, other tests can be done, such as:
- Angiography: This involves taking X-ray pictures of the blood vessels using a special dye.
- CT scan: This is another way to take pictures of the brain.
- Hydranencephaly ultrasound: An ultrasound test specifically done to look for this condition.
- Transillumination: This involves shining a light through the brain tissue from under the skull to see if there are any abnormalities.
- Genetic testing: See if it's hereditary.
What are the treatments for babies with hydranencephaly?
This is a very sensitive issue. If hydranencephaly is confirmed during prenatal testing, some families decide to have a therapeutic abortion , which is to end the pregnancy for medical reasons. This is a very difficult decision, but doctors and counselors provide the necessary support at such times.
If a baby is born with hydranencephaly, there is no cure. Treatment is mainly aimed at reducing symptoms and making the baby as comfortable as possible.
- Surgery is performed to remove excess fluid from the brain and insert a shunt (a small tube) to reduce pressure in the brain. While this is an effective treatment for hydrocephalus, it is of limited use for hydranencephaly.
- A treatment called Endoscopic Choroid Plexus Coagulation (ECPC) can sometimes be used as a treatment for rapidly enlarging brain.
In addition, the doctor may also recommend things like:
- Antiseizure medications.
- Nutritional support.
- Physical therapy to reduce muscle symptoms.
- If there is respiratory failure, tracheostomy (a minor surgery in the throat) or mechanical ventilation may be necessary.
Can this condition of hydranencephaly be prevented?
Scientists still don't fully understand why this happens, so they can't say for sure how to prevent it. However, as mentioned earlier, some cases have been linked to exposure to toxins during pregnancy. For example, drugs like cocaine, smoking, and some seizure medications like sodium valproate.
Therefore, it is very important for pregnant mothers to avoid exposure to toxins. It is also essential to talk to their doctor about any medications they are taking.
What is the life expectancy of a baby with hydranencephaly?
This is sad to hear. The outlook for children with hydranencephaly is not very good. Many babies die before birth or before the age of one. Very rarely, with intensive supportive care, a child with hydranencephaly can live for several years.
How do you deal with a situation like this?
Finding out that your child has a condition like hydranencephaly is a very difficult thing to deal with. That's understandable.
- It is very important to provide the necessary education to families to understand the seriousness of this disease.
- Also, seeking counseling and joining support groups where you can connect with other families facing similar situations can be a great source of strength.
Hydranencephaly is a rare birth defect that affects brain development. It is usually diagnosed before or shortly after birth. If your baby has this condition, your medical team will provide you and your family with all the support, education, and counseling you need. Remember, you are not alone.
Final Take-Home Message
Dear Mom and Dad, Hydranencephaly is a truly heartbreaking and challenging condition. However, it is important to be aware of it.
- This is a very rare condition that occurs when parts of the brain do not develop properly.
- This can often be detected through prenatal scans .
- Although there is no cure for this, there are treatments to control the symptoms and make the baby comfortable .
- Because the exact cause is unknown, it is important to take precautionary measures, such as avoiding toxins during pregnancy.
- Families facing this situation can gain great strength from doctors, counselors, and support groups .
If you have any further questions about this, please speak to your doctor. They will provide you with all the information and guidance you need.
` Hydranencephaly, brain malformations, birth defects, infant health, cerebrospinal fluid, hydrocephalus, prenatal diagnosis
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