A ganglion cyst is a benign, fluid-filled sac that grows from the lining of a joint or a tendon sheath. The fluid is a thick, clear jelly-like substance. The most common location is the back of the wrist, followed by the palm side of the wrist, the base of a finger, and the last finger joint, where it is called a mucous cyst.
Ganglion cysts are not cancer. They can appear quickly or slowly, change size, and sometimes disappear on their own. The reason to treat one is symptoms: pain, pressure on a nerve, interference with motion, or, for some patients, appearance.
Symptoms
A ganglion cyst may cause:
- A visible or palpable lump, often on the back of the wrist
- A change in size with activity, sometimes shrinking with rest
- Aching or pressure with wrist motion or loading
- Tingling if the cyst presses on a nearby nerve
- No symptoms at all, which is common
How it is diagnosed
Most ganglion cysts are diagnosed by examination. An ultrasound or MRI is used when the diagnosis is unclear, when the cyst is in an unusual location, or to map a cyst before surgery.
Reassurance is part of the treatment. A confirmed ganglion cyst that does not hurt and does not limit the hand can simply be watched, and a meaningful share resolve without any intervention. Dr. Lee does not operate on a lump that is not causing a problem.
When a cyst is painful or interferes with use, or is aesthetically displeasing, the options are aspiration, drawing out the fluid with a needle, or surgical removal. Aspiration is quick but has a higher recurrence rate (~50%) because the root of the cyst remains. Surgical excision removes the cyst along with its stalk and a small cuff of the joint capsule it arises from, which lowers the chance of recurrence. For some dorsal wrist cysts, removal can be done arthroscopically through small incisions.
Observation
A painless cyst can be left alone. Many fluctuate in size, shrink or disappear over time, and there is no harm in watching one that is not causing symptoms.
Aspiration
The fluid is drawn out with a needle in the office. This is simple and can relieve pressure quickly, but the cyst returns in a significant number of cases (~50%) because the stalk that produces the fluid is still present. It is a reasonable first step for many patients.
Surgical excision
For cysts that are painful, recurrent, or interfering with use, surgical removal takes out the cyst and the stalk that connects it to the joint, along with a small portion of the capsule. Removing the root is what lowers the recurrence rate.
Recovery timeline
Recovery is usually straightforward:
- After aspirationReturn to normal activity right away. A snug wrap and a splint is placed. Watch for the cyst to refill.
- After excision, weeks 0 to 2Light splint or dressing. Begin gentle motion early to avoid wrist stiffness.
- After excision, weeks 2 to 6Progressive return to full activity and strengthening as comfort allows.
What patients commonly misunderstand
A few points patients appreciate:
- It is not cancer. Ganglion cysts are benign. The concern is symptoms and function, not malignancy.
- The old remedy of hitting it is a bad idea. The folk practice of striking a ganglion with a heavy book can injure surrounding structures and does not reliably resolve the cyst. It is not recommended.
- Removing the root matters. Aspiration alone leaves the stalk that makes the fluid, so cysts often refill. Surgery removes the stalk and a cuff of capsule, which is why it recurs less often.
This page is general educational content authored by Dr. Lee. It is not a substitute for individual medical advice. Every patient's case is different, book a consultation to discuss yours.