Bakers Cyst (Popliteal Cyst)

Last updated 21.05.13

 

Index

 

Definition

-  Synovial fluid collection from knee joint causing pronounced posterior knee mass

 

Features

-  Cyst is continuous with knee joint capsule

 

Causes

-  OA of knee

-  Knee injury

-  Effusion

-  Septic arthritis

 

Associated S/S

-  May be asymptomatic

-  Pronounced swelling in poplitela fossa

-  Most noticeable when standing

-  Sensation of pressure or tightness in posterior knee

-  Knee pain or aching

-  Knee exam

-  Restricted mobility (if significantly large)

-  Transillumination

 

Bakers

 

Complications

-  Dissection into calf muscles

-  Rupture & fluid leakge by gravity to ankle

 

Ix

-  +/- Knee X-ray: OA

-  +/- MRI

-  +/- US

-  Confirm Dx

-  Haematoma

 

Mx

-  Mx of underlying cause

-  Avoid aggravating activities

-  Physiotherapy: crutches, exercises for strength & mobility

-  Intrabursal corticosteroids

-  Aspiration

-  Usually not done

-  High risk of recurrence

-  Surgery: cyst removal

 

 

 

References

 

Better Health Challe: Bakers Cyst, www.betterhealth.vic.gov.au/bhcv2/bhcarticles.nsf/pages/Baker%27s_cyst