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Baker's Cyst

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Knee surgeon
Baker's Cyst Symptoms and signs Diagnosis Treatment Kneecap Joint Dislocation Investigating your Knee Problem Articular Cartilage Injuries Anterior Cruciate Ligament (ACL) Injury Total Knee Replacement Partial Knee Replacement Collateral Ligament Injury (PCL) Injury And Reconstruction Meniscal Problems Alternatives To Joint Replacement Revision Total Knee Replacement Hamstring Tears Multi-ligament knee injury Patellar Tendonopathy Tibial Plateau Fracture Snapping Hamstrings Iliotibial Band (Runner's Knee) Chronic Compartment Syndrome

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Baker’s Cyst or Popliteal Cyst

What is it?

A Baker’s cyst is a build up of fluid at the back of the knee.

What are the symptoms?

These cysts may cause pain and pressure effect. They may limit knee bend if they are particularly large. Occasionally they may burst and cause pain and swelling in the calf; this can be confused with a blood clot (deep vein thrombosis or DVT)

What are the causes?

The most common causes are osteoarthritis and degenerative cartilage tears within the knee. Other causes include knee injury, inflammatory arthritis such as rheumatoid arthritis or gout.


This is normally made by examination alone although MRI is very often used to confirm the diagnosis and the possible cause.

What is the treatment?

If you have a Baker’s cyst that isn’t causing any symptoms, treatment will not normally be required.

If the cyst is symptomatic, over-the-counter painkillers and anti-inflammatories will help alleviate pain and swelling. A compression bandage or an ice pack should also help. Take care not to place ice directly on the skin as it can cause a burn. Instead, wrap the ice (or bag of peas) in a tea towel.

It is important to identify and treat any underlying cause such as rheumatoid arthritis.

Surgery is very occasionally required to drain or remove the cyst.