Symptoms and Signs of Ganglion Cyst

Medical Author:
Medically Reviewed on 3/25/2019

Doctor's Notes on Ganglion Cyst

A ganglion cyst is a sac-like swelling that arises from the synovium, the tissue that lines a joint or surrounds a tendon. Ganglion cysts can be caused by inflammation of the synovium due to local trauma or injury. They may also arise as early signs of arthritis. Ganglion cysts are most common around the joints of the wrists and ankles.

Signs and symptoms associated with a ganglion cyst include painless, localized swellings of the involved area. There are usually no visible signs of inflammation like redness or warmth. A ganglion cyst behind the knee that can become large is known as a Baker's cyst. This type of ganglion can cause a sense of fullness or tightness in the knee joint.


Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.