Knee Baker\’s Cyst

Knee Baker’s Cyst – What is a Baker’s Cyst?

A Baker’s cyst is a fluid-filled cyst. It typically occurs in the popliteal fossa, usually slightly on the inner side.

baker's cyst knee

A Baker’s cyst develops due to an increase in fluid within the knee joint. An increase in intra-articular pressure causes the knee capsule to bulge into the popliteal fossa, forming a cyst. This typically occurs in the inner posterior region of the knee joint. There are two bursae located there, into which the cyst can grow.

Causes of a Baker’s Cyst

  • Cartilage damage/Osteoarthritis
  • Meniscus damage
  • Knee joint instability

This leads to an inflammatory reaction in the joint. The inflammatory reaction of the joint causes an overproduction of synovial fluid.

Symptoms of a Baker’s Cyst

Depending on the size of the cyst, there may be a feeling of pressure in the popliteal fossa. This can lead to restrictions and pain when bending and extending the knee joint.

Diagnosis of Knee Baker’s Cyst

A manual examination of the knee joint and the presenting symptoms are crucial for diagnosis.

As a further diagnostic measure, an ultrasound and/or a magnetic resonance imaging is advisable (MRI).

In the case of a Baker’s cyst, an MRI is the best diagnostic method. It can particularly clarify the underlying causes of the cyst (meniscus damage, cartilage damage, osteoarthritis).

Treatment of Baker’s Cyst

Conservative measures include rest, anti-inflammatory measures and anti-inflammatory medication, as well as elastic compression bandages.

In the initial stage, I attempt to gently massage the Baker’s cyst to remove fluid from the popliteal fossa.

For temporary relief, I perform an ultrasound-guided puncture of the cyst with local anesthesia and aspirate the fluid. Simultaneously, I inject a cortisone preparation into the cyst to promote its “adhesion”.

If the cyst has reached a very voluminous size, it can be surgically removed. Care must be taken to ensure that the cyst’s opening to the knee joint is tightly closed to prevent recurrence.

Are you looking for an experienced knee specialist in Vienna? Do not hesitate to contact me. My practice at the  Wiener Privatklinik is centrally located in the 9th district of Vienna.

Dr. Mark Schurz

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