Understanding Congenital Portosystemic Shunts (CPSS): A Guide for Families

Hearing that your child has a congenital portosystemic shunt (CPSS) can feel overwhelming. The good news is that doctors are learning more about this rare condition every year, and many children do very well with proper care and treatment.

What Is CPSS?

A congenital portosystemic shunt, or CPSS, is a rare condition that a child is born with.

Normally, blood from the stomach and intestines travels to the liver first. The liver acts like the body's cleaning and processing center. It removes waste, helps the body use nutrients, and supports healthy growth.

In a child with CPSS, some or all of this blood takes a "shortcut" around the liver. This shortcut is called a shunt. Because the blood skips the liver, substances that should be filtered out can travel through the rest of the body.

Why Is the Liver Important?

The liver has many important jobs. It cleans the blood. It removes waste. It helps turn food into energy. It helps with growth. It also helps keep hormones balanced. When blood bypasses the liver, these jobs may not work as well.

Symptoms of CPSS

Every child with CPSS is different. Some children have no symptoms. Others may have health problems over time.

Possible symptoms of CPSS include:

• Trouble paying attention: schoolwork may feel harder than expected
• Learning new skills more slowly
• Changes in behavior or mood
• Breathing problems/short of breath
• Tiring easily/having trouble keeping up during play or sports
• Liver problems: there may be small growths called nodules, or the liver may be larger than normal
• Growing slower than expected
• Low blood sugar
• Hormone issues that affect growth and development
• Heart issues
• Changes in blood vessels that affect blood flow

Because CPSS can affect many parts of the body, it can be hard to find at first. A child may see several doctors before CPSS is diagnosed.

How Is CPSS Diagnosed?

Doctors use imaging tests to look at the blood vessels around the liver.

An ultrasound is often the first test. It uses sound waves to make pictures of the organs and blood vessels. A CT scan or MRI gives doctors more detailed pictures. These tests can show the size and location of the shunt.

Sometimes doctors do an angiogram. During this test, a small tube called a catheter is placed into a blood vessel. This helps doctors see blood flow more clearly. It also helps them plan treatment.

Does Every Child Need Treatment?

Doctors look at many things before recommending treatment. They consider your child’s age, symptoms, liver health, and the size and type of shunt. Not every child needs treatment.

Some small shunts found in babies close on their own during the first year of life. Other shunts stay open. These may cause problems later and should be monitored.

How Is CPSS Treated?

The goal of treatment is to help blood flow through the liver the right way.

Many children can be treated without major surgery. Doctors can use X-ray guidance to place a small device inside the blood vessel. This device closes the shunt.

Some children need surgery. Surgery may close the shunt or rebuild blood vessels near the liver. Very rarely, a liver transplant may be needed. This is only considered when the blood vessels cannot be repaired or when severe liver problems develop.

Early Diagnosis Matters

Finding CPSS early can make a big difference. After treatment, many children have more energy. Some have better learning and focus. Breathing may improve. Liver tests may get better. Treatment may also lower the risk of future problems.

Regular follow-up is important. With early diagnosis and expert care, many children with CPSS can live healthy and active lives.