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Kidney Cyst

Medically reviewed by Last updated on Jul 7, 2024.

What is a kidney cyst?

A kidney cyst is a fluid-filled sac that grows in your kidney. A simple cyst usually does not contain cancer. A complex cyst contains calcium deposits and needs to be checked over time for cancer. You may have one or more cysts. Both kidneys may form cysts at the same time.

Normal Kidney Polycystic Kidney

What increases my risk for a kidney cyst?

What are the signs and symptoms of a kidney cyst?

Kidney cysts usually do not cause symptoms. A cyst that grows large may cause pain or discomfort in your side or abdomen. You may have blood in your urine or dark urine, or develop high blood pressure. Tenderness along with pain and a fever may be a sign of an infected cyst.

How are kidney cysts diagnosed?

Kidney cysts are usually found during tests for another reason. Once the cyst is found, you may need the following:

How are kidney cysts treated?

Your cyst may need no treatment. Your healthcare provider may want you to have tests to check the size of the cyst over time. You may also need tests if you have hard deposits in the cyst. The deposits will be checked for cancer or other material that can cause health problems. Fluid may need to be drained from a cyst that becomes infected, bursts, or blocks blood or urine flow in the kidney. Surgery may be needed if the cyst is large.

What can I do to prevent or manage kidney cysts?

When should I seek immediate care?

When should I contact my healthcare provider?

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.