Kidneys Polycystic Kidney Disease Pkd

Overview

Polycystic kidney disease (PKD) is a genetic condition, meaning it is passed down in families through genes. In PKD, many fluid-filled sacs called cysts grow in the kidneys. Over time, the cysts can make the kidneys larger and may reduce how well the kidneys filter waste from the blood. PKD is not caused by anything you did or did not do.

PKD is one of the more common inherited kidney conditions. The most common form often appears in adulthood. A rarer form can affect babies and young children.

PKD affects people of all sexes and ethnic backgrounds. Because it runs in families, having a parent, sibling, or other close relative with PKD raises your chance. Some people do not know of any family history.

Symptoms

Common symptoms

• Often no symptoms at first
• Pain in the back, side, or belly
• Blood in the urine
• High blood pressure
• Urine infections
• Kidney stones
• Feeling full quickly or a larger belly
• Tiredness

Symptoms in children

• Often no symptoms
• High blood pressure
• Urine infections
• Belly pain or a larger belly
• Blood in the urine
• In a rare severe form, feeding or breathing problems in newborns

Symptoms in older adults

• More noticeable symptoms as cysts grow over time
• High blood pressure
• Kidney stones or urine infections
• Tiredness or lower energy
• Swelling in the legs or feet if kidney function drops
• A gradual decline in kidney function

Causes

Main causes

• PKD is caused by changes in genes that affect how the kidneys grow and work.
• The most common form is passed from one parent to a child. A child of an affected parent has about a 50 in 100 chance of inheriting it.
• A rarer form happens when both parents carry a gene change and pass it on. This form can cause serious kidney problems in babies and young children.

Risk factors

• Having a parent, sibling, or child with PKD
• A known gene change linked to PKD in your family
• Getting older, because cysts tend to grow slowly over time
• High blood pressure, which can make kidney damage worse

When to see a doctor

See a doctor urgently if:

• Fever with pain in your back or side
• Blood in your urine that does not stop or comes with pain
• New swelling, rapid weight gain, or shortness of breath
• A urine infection with fever or shaking chills
• A very high blood pressure reading with headache or feeling unwell

Book a routine appointment if:

• PKD runs in your family and you want to talk about screening
• New or lasting pain in your back, side, or belly
• Blood in your urine
• High blood pressure readings
• Repeated urine infections or kidney stones
• Tiredness, swelling, or changes in how much urine you pass

Diagnosis

A doctor will ask about your symptoms and family history, examine you, and may arrange imaging and blood or urine tests. Sometimes genetic testing or a referral to a kidney specialist is helpful.

Tests that may be done

• Ultrasound scan, which uses sound waves to make pictures of the kidneys
• MRI or CT scan to look at the kidneys more closely
• Blood tests to estimate how well the kidneys are filtering
• Urine tests to check for blood, protein, or infection
• Blood pressure checks
• Genetic counseling and genetic testing in some families

What to expect at your appointment

Tests are usually simple and often painless. An ultrasound is safe and does not use radiation. You may need repeat tests over time to track your kidney function. A kidney specialist may join your care team if needed.

Treatment

There is no cure for PKD, but good care can help protect the kidneys, manage symptoms, and slow problems over time. Treatment is tailored to each person and may involve your family doctor, kidney specialist, nurse, dietitian, and pharmacist.

Self-care at home

• Check your blood pressure at home if your care team advises it
• Eat less salt and choose balanced meals
• Drink enough fluid unless your doctor gives different advice
• Stay active in ways that suit you
• Do not smoke, and get help to quit if needed
• Ask your pharmacist before using over-the-counter pain relievers, supplements, or herbal products
• Keep your appointments and take medicines exactly as your care team advises

Medical treatments

Doctors focus on controlling blood pressure, treating pain and infections, and managing kidney stones. Some people may be offered specialist medicines that can help slow cyst growth. If the kidneys stop working well, dialysis or a kidney transplant may be options. Your care team will explain what is right for you.

When is surgery considered?

Surgery may be used for very large or painful cysts, repeated infections, bleeding, or kidney stones. Some people need a kidney removed or a kidney transplant. These decisions are made with a specialist.

Living with this condition

PKD is part of your life, but it does not have to define it. Keep your usual routines where you can, track your blood pressure if advised, and plan regular check-ups. Listen to your body and ask for help when you need it.

Lifestyle tips

• Stay physically active within your ability
• Keep to a healthy weight
• Choose less salt and more fresh foods
• Get enough sleep and manage stress
• Avoid smoking and limit alcohol
• Ask before using medicines or supplements that could affect the kidneys
• Keep recommended vaccines up to date

Diet and exercise

There is no single diet that works for everyone with PKD. Many people benefit from eating less salt and following balanced meals. A dietitian can help make a plan that fits you. Regular movement, such as walking or swimming, is good for blood pressure and overall health. Ask your care team if you should avoid contact sports or heavy lifting, especially if your kidneys are very large.

Mental health and emotional wellbeing

Living with a long-term condition can bring worry, sadness, or stress. These feelings are common and okay to talk about. Your care team can connect you with a counselor or support group. If you feel overwhelmed or have thoughts of harming yourself, contact your local crisis support service or emergency services right away.

Prevention

You cannot prevent inherited PKD. Healthy habits can still help protect your kidneys and heart. If PKD runs in your family, talk with your doctor about screening and genetic counseling.

Vaccines

Keep recommended vaccines up to date. Ask your kidney team which vaccines are right for you, especially if you are on specialist treatment.

Screening programmes

Screening may include a family history review, blood pressure checks, kidney function blood tests, urine tests, and ultrasound. Genetic counseling can help with family planning and testing decisions.

Complications

If left untreated

• High blood pressure
• Cyst infections or bleeding
• Kidney stones
• Gradual loss of kidney function
• Kidney failure in some people
• Liver cysts in some forms of PKD
• A rare blood vessel problem in the brain in some families

Long-term outlook

Most people with PKD can live full lives. Regular care, blood pressure control, healthy habits, and timely treatment make a real difference. Some people never need dialysis or a transplant, while others do, and those treatments can be life-changing. Support is available at every stage.

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