about us
orthopedic topics message forum

orthopedic topics


Popliteal Cyst (Baker's Cyst)

What is it?

Popliteal cyst or Baker's cyst is a cyst that occurs in the back of the knee. The cyst consists of a sac distended with clear thick fluid often arising from the tendon sheath in the back of the knee. Frequently it arises from the bursa just deep to the Semimembranosus tendon, so it is also called a Semimembranosus cyst.

What causes it?

No one knows why it occurs in children. In adults, a popliteal cyst communicates with the knee joint, and reflects a problem in the knee. In children, the popliteal cyst usually does not communicate with the knee, and does not reflect a knee problem.

What are the symptoms?

The child could present at any age, and is often detected by a parent accidentally. It is usually painless, and does not interfere with knee function.

What does your doctor do about it?

Your doctor may do an X-ray to rule out other knee problems, but it is usually negative. The location of the cyst and it characteristic feel is diagnostic, and other tests are usually unnecessary. Usually no treatment is necessary except for periodic observation. Most popliteal cysts in children disappear within 1 to 2 years. In the rare case where the cyst gets larger and causes symptoms, excision can be performed.


NOTICE: The information presented is for your information only, and not a substitute for the medical advice of a qualified physician. Neither the author nor the publisher will be responsible for any harm or injury resulting from interpretations of the materials in this article.

Questions or comments? Post your thoughts in the Orthoseek Message Forum!
Find a pediatric orthopedic surgeon in an area near you.

Home | About Us | Orthopaedic Topics | Message Forum

Copyright (c) 2003 Wheaton Resource Corp.
Comments, questions, or suggestions are welcome. Please contact us using this form.