Polycystic Kidney Disease

Autosomal dominant PKD

Autosomal dominant polycystic kidney disease (ADPKD) is the most common form of PKD. It accounts for about 90% of all PKD cases. Autosomal dominant means that if one parent has the disease, there is a 50% chance that the disease will pass to a child. All people can be affected.

ADPKD is often diagnosed in adulthood. It used to be called adult polycystic kidney disease. Usually, at least one parent must have the disease for a child to inherit it. In 10% of cases, there may be no family history of PKD. These cases are new mutations in a family. In very few cases, ADPKD occurs suddenly after conception. Parents would not be at increased risk to have more children with PKD. But people with PKD have a 50% chance of passing the gene on to their children.

Symptoms often start between age 30 and 40. But they can start in childhood. They may include:

• Belly (abdominal) or side pain.
• Your belly growing larger.
• A pale color to your skin.
• Easy bruising.
• High blood pressure.
• Kidney stones.
• Brain aneurysms.
• Diverticulosis.
• Urinary tract infections.
• Blood in the urine.
• Liver and pancreatic cysts.
• Abnormal heart valves.

ADPKD may occur with other conditions such as:

• Tuberous sclerosis (a genetic syndrome involving seizures, intellectual disability, benign tumors, and skin lesions).
• Liver disease.
• Severe eye problems.

The symptoms of ADPKD may look like other health problems. Always check with your doctor for a diagnosis.

Diagnosis of ADPKD may include:

• Using imaging tests to find cysts on the kidney and other organs.
• Reviewing family history of ADPKD. There are three different dominant genes that have been identified. They further subdivide ADPKD into PKD1, PKD2, and PKD3.

Your doctor will figure out a treatment plan after careful consideration of your symptoms and medical history. Treatment may include:

• Lifestyle changes like stopping smoking, regular exercise, or maintenance of a healthy weight. It may also include reducing salt intake, drinking plenty of water, and not having caffeine.
• Pain medicine.
• Surgery to shrink cysts and ease pain.
• Treatment for high blood pressure.
• Treatment for urinary tract infections.
• Dialysis.
• A kidney transplant.

Autosomal recessive PKD

Autosomal recessive PKD (ARPKD) is a rare form of PKD. It is thought to be caused by a particular genetic flaw that is different from the genetic flaw that causes ADPKD. Parents who don't have the disease can have a child with the disease if both parents carry the abnormal gene and both pass the gene to their child. Carrier parents have a 25% chance with each pregnancy to have a child with this type of PKD. All people can be affected.

ARPKD is sometimes found before birth using a fetal ultrasound. Symptoms can start before birth. In most cases, the earlier symptoms start, the more severe the outcome.

Children born with ARPKD may develop kidney failure within a few years. They often have:

• High blood pressure.
• Urinary tract infections.
• Frequent urination.

The disease also usually affects the liver, spleen, and pancreas. This results in low blood cell counts, varicose veins, and hemorrhoids.

The symptoms of ARPKD may look like other health problems. Always check with your child's doctor for a diagnosis.

Diagnosis often includes ultrasound imaging of the fetus or newborn to reveal cysts in the kidneys. An ultrasound exam of kidneys of relatives may also be helpful.

Your child's doctor will figure out a treatment plan after careful consideration of the child's symptoms and medical history. Treatment may include:

• Treatment for high blood pressure.
• Treatment for urinary tract infections.
• Hormonal therapy.
• Dialysis.
• A kidney transplant.