Ganglion cysts are lumps that most often appear along the tendons or joints of wrists or hands. They also can occur in ankles and feet. Ganglion cysts are typically round or oval and are filled with a jellylike fluid. They are not cancer.
Small ganglion cysts can be pea-sized. They can change size. Ganglion cysts can be painful if they press on a nearby nerve. Sometimes they affect joint movement.
For a ganglion cyst that causes problems, having a health care provider drain the cyst with a needle might be an option. So might removing the cyst surgically. But if there are no symptoms, no treatment is necessary. Often, the cysts grow and shrink. Some go away on their own.
Symptoms
These are common features of ganglion cysts:
Location. Ganglion cysts most often develop along the tendons or joints of wrists or hands. The next most common locations are the ankles and feet. These cysts grow near other joints too.
Shape and size. Ganglion cysts are round or oval. Some are too small to feel. The size of a cyst can change, often getting larger over time with joint movement.
Pain. Ganglion cysts usually are painless. But if a cyst presses on a nerve or other structures, it can cause pain, tingling, numbness or muscle weakness.
Treatment
Ganglion cysts are often painless and need no treatment. Your health care provider might recommend watching the cyst for any changes. If the cyst causes pain or gets in the way of joint movement, you may need to:
Keep the joint from moving. Activity can cause a ganglion cyst to grow. So wearing a brace or splint to keep the joint still for a time might help. As the cyst shrinks, it may release the pressure on nerves, relieving pain. But long-term use of a brace or splint can weaken nearby muscles.
Drain the cyst. Draining the fluid from the cyst with a needle might help. But the cyst can come back.
Surgery. This may be a choice if other approaches don't work. Surgery involves removing the cyst and the stalk that attaches it to the joint or tendon. Rarely, surgery can injure the nearby nerves, blood vessels or tendons. And the cyst can come back, even after surgery.
During the physical exam, a health care provider might press on the cyst to see if it hurts. Shining a light through the cyst might show if it's solid or filled with fluid.
Imaging tests — such as an X-ray, ultrasound or MRI — can help confirm the diagnosis as well as rule out other conditions, such as arthritis or a tumor.
Fluid drawn from the cyst with a needle might confirm the diagnosis. Fluid from a ganglion cyst is thick and clear.
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