Ganglion cysts are fluid-filled capsules that commonly form on the top of the wrist, though they can develop around any joint or tendon. Removing the fluid — aspiration of a ganglion cyst — is an option when the cyst becomes large or painful. We often perform ultrasound-guided aspiration of ganglion cysts for accuracy and safety. So when is ganglion cyst aspiration worth it?
What causes a ganglion cyst?
Ganglion cysts aren’t true cysts — they arise from joints and tendon sheaths. Degeneration within a joint or tendon sheath appears to increase the production of synovial fluid. This fluid leaks out and forms a thick, jelly-like, fluid-filled sac: the ganglion cyst.
Most lumps on the wrist or foot are ganglions. But other causes of wrist lumps include giant cell tumours, lipomas, and nerve cell tumours, and foot bumps have other causes too.
Symptoms of a ganglion cyst
Most ganglions cause no symptoms. They’re usually noticed as a pain-free lump on the wrist or elsewhere. If the lump grows, it can press on nearby tendons and nerves, causing pain, numbness, or tingling.
We often suggest imaging to confirm the diagnosis. Ultrasound or MRI confirms a simple fluid-filled sac and excludes solid tumours such as giant cell tumours or lipomas.
Is a ganglion cyst dangerous?
Generally, ganglion cysts are a nuisance or a cosmetic concern rather than a danger. But not every lump is a ganglion, so getting it checked with ultrasound is crucial to confirm it’s a simple ganglion cyst.
Can a ganglion cyst go away?
Yes. Some ganglion cysts keep growing, while others disappear on their own, so treatment isn’t essential for every cyst.
How to treat a ganglion cyst
Treatment is only needed when the cyst causes symptoms or the appearance concerns the patient. Most doctors advise no treatment for a small, harmless ganglion, and most people are reassured once we confirm it isn’t sinister.
One traditional home remedy is hitting the cyst with a heavy book to burst it. We don’t recommend this — the trauma can damage nearby structures.
Aspiration of a ganglion cyst
Aspirating the fluid from the cyst is a good option. We use a large needle, because the fluid is thick and hard to remove through a fine one. Ultrasound-guided aspiration of a ganglion cyst helps ensure all the fluid is removed, and seeing the needle track protects nearby tendons and nerves.
The main drawback of ganglion cyst drainage is recurrence — the cyst returns in about 50% of cases. Injecting a small dose of cortisone into the residual sac after aspiration reduces this: recurrence after ultrasound-guided aspiration plus a cortisone injection falls to about 30–40%.
Steroid injection for a ganglion cyst
Is it worth injecting steroid after aspiration of a ganglion cyst? We think so — it reduces the chance of recurrence by at least 10%.
Can you get ganglion cysts in the foot?
Yes. Ganglion cysts can form anywhere, but the wrist, foot, and ankle are the commonest sites. In one case, a ganglion inside the ankle pressed on the nerves — the athlete had inner-ankle pain with pins and needles into the foot. We aspirated the cyst with a needle, with good results.
Ganglion cyst aspiration vs surgery: which is better?
The most aggressive option is complete surgical removal of the ganglion, taking out the whole sac lining to prevent return. Even so, recurrence after surgery approaches 25%. Because surgery is more invasive and still carries a recurrence risk, most doctors suggest one or two ultrasound-guided aspirations first.
Aspiration of a ganglion cyst: cost
The cost of ganglion cyst aspiration depends on the clinic and whether a cortisone injection is added. Dr Masci performs the procedure as a one-stop visit — assessment, diagnostic ultrasound, and aspiration in a single appointment — with Chelsea the most cost-effective location. Please review the current fees here.
Frequently asked questions about aspiration of a ganglion cyst
Do ganglion cysts go away on their own?
Sometimes. A ganglion cyst can burst or disappear, or it can grow. If it doesn’t hurt and isn’t a cosmetic concern, it’s reasonable to leave it alone.
Can a ganglion cyst cause pain?
Yes, but usually only when it grows and presses on nerves or tendons. A painful lump can also have a more worrying cause, so see a doctor if your lump grows or becomes increasingly uncomfortable.
Can you see a ganglion cyst on an X-ray?
No. An X-ray only shows the bones. Ultrasound or MRI is needed to confirm a ganglion cyst.
How much rest from sport do you need after aspiration of a ganglion cyst?
It depends on the sport and the cyst’s site and size. For cysts in weight-bearing tendons or joints such as the ankle or foot, we suggest about a week off impact activity. For office-based work, a few days is enough.
What are the risks of a ganglion aspiration?
Risks include infection (very rare), damage to nearby nerves or tendons, and recurrence (about 50%). Injecting cortisone into the sac can rarely cause fat atrophy or skin depigmentation. Ultrasound reduces these risks by improving accuracy and avoiding important structures.
How fast can a ganglion cyst grow back after aspiration?
It varies. Sometimes the cyst returns within days to a few weeks; other times it takes weeks or months. Lower-limb cysts seem to recur more quickly. Occasionally a cyst re-fills almost immediately, usually from bleeding into the sac — we then re-aspirate, with compression and ice.
Can I keep aspirating a ganglion cyst myself at home?
No. Self-draining with a needle risks infection and damage to nerves and tendons, and rarely removes the thick fluid fully. A ganglion should be aspirated under sterile, ultrasound-guided conditions by a qualified doctor.
Final word from Sport Doctor London about aspiration of a ganglion cyst
Ganglion cysts are common. When they’re painful, we recommend at least two aspirations before considering surgery. Choose a doctor who specialises in diagnosing ganglion cysts and performing aspiration under ultrasound — not all practitioners who inject are doctors, so do your homework first.
To book a one-stop ganglion cyst assessment and ultrasound-guided aspiration with Dr Masci in London, contact the team here or call +44 (0) 203 488 0350.
My daughter has a similar case of ganglion cyst but we never visit any surgeon we didnt inquire to anybody until i research it and found your page. My daughter said its not painful so i never frighten but one day she said mom i think its become big so become nervous …i dont know what to do…please help me sir
Hi Thank you for your email. Most ganglions are not painful but might become painful if they get bigger or press on structures in the wrist eg nerves, tendons. I’d suggest an ultrasound to make sure it is a ganglion. Then you and your daughter can decide on whether to do something about it. Lorenzo
I just recently found out the other day , that I have a ganglion cyst. It came larger over a year of having it and very painful. So they gave me several options after X-rays were taken. I decided to have it aspirated because I’m trying to avoid surgery. I have to wear a brace over my hand and wrist for four weeks before I return to my doctor.
Hi Londy, I think aspiration is a definite option if you want to avoid surgery. Lorenzo
Hi doctor i have lumps on my wrist and i dont have may idea what is that im experiencing pain mostly in cold times what should i do? Pls give me some advise.. Thank u
Any unexplained and painful lump should be investigated. I’d suggest an ultrasound. These lumps could be cysts (ganglions0 or they could be solid massess. An ultrasound will differentiate between the two. LM
I have been Aspirating and draining my ganglion cyst on my thumb for years removing the clear fluid with the needles.
Hello Dr. I just left an ortho appointment for a ganglion cyst. I never noticed it on my right thumb until after I had suffered a lifting injury at work. Can the cyst have came from the injury?
Hi Cynthia, Yes ganglions can arise from trauma or injury.
LM
Hi,
i’m at of noticing a lump on my hand and my wrist on both sides? i’m so upset and down because i’m so scared if it’s going to effect my health, my doctor said the one on my hand is a cysts but today i noticed the both sides of my wrist are sore and a lump on each side are really at of appearing out of no where? i’m starting to feel a bit of pain on my right hand wrist? should i be concerned
Hi Amanda, you should get an ultrasound to see if the lump is a cyst. if it is, then you have nothing to worry about.
LM
Thanks. Good article. In Usa. Rectus femoral cyst.
I had a ganglion cyst on the arch aspirated about a month ago by a podiatrist. It immediately came back but now this time there is a growing pool of blood presumably where I was injected. Should I return? If he aspirated again, do I have to continue coming back? Is this going to be a lifelong thing I have to deal with? Just want to know what I’m in for!
Hi Thanks for the comment. Yes i’ve had a few cases where the cyst had re-accumulated almost immediately after a complete aspiration.
I suspect most of these cases are bleeding into the cyst.
Generally, I re-aspirate followed by compression and ice.
LM