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Morant Baker Cyst

What is a Morant Baker cyst?
Morant Baker cyst is a swelling caused by the knee joint fluid at the back of the knee.
What are the symptoms of a Baker's cyst?
Baker’s cyst may remain asymptomatic or may cause diffuse pain at the back of the knee. It may cause pain and discomfort during knee movements, especially during flexion of the knee.
What causes a Morant Baker cyst?
Various types of arthritis result in a Morant baker cyst. Osteoarthritis of the knee, Rheumatoid arthritis affecting the knee may result in a Morant Baker cyst. The excess fluid caused due to arthritic process tends to track and collect in a pouch at the back of the knee resulting in a Morant Baker cyst.
How is a Morant Baker cyst diagnosed?
Morant baker cyst is suspected on the basis of clinical exmination. It can be confirmed using either an ultrasound or a MRI of the knee.

Morant Baker Cyst Ultrasonic

Morant Baker cyst as seen on ultrasound

How is a Morant Baker cyst treated?
A Morant baker cyst is aspirated with a needle. A local steroid injection is generally given at the same time to reduce the inflammation & prevent recurrence. Complicated cysts may require an operation for excision.
What are the complications of a Morant Baker cyst?
A Morant baker cyst may rupture and cause extravasation of fluid in the calf.

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Created on: April 2007
Last updated on: Feb 2015
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