Ganglion Cysts

What Is a Ganglion Cyst?

A ganglion cyst is a lump that occurs near joints or tendons in the hand and wrist. Think of it as a water balloon on a straw. The balloon is filled with a clear, gel-like fluid, and the straw connects to a joint or tendon sheath where the fluid originates. Joints and tendon sheaths naturally produce fluid, and changes in this fluid production can cause the cyst to grow larger, shrink, or even disappear completely over time.

Ganglion cysts appear in common, predictable locations. They're often found on the back of the wrist in the middle, on the palm side of the wrist toward the base of the thumb, at the base of a finger on the palm side, or at the fingertip just below the nail. The cyst itself is not cancerous and will not spread to other areas. It's simply the body's way of allowing joint fluid to accumulate outside the joint capsule.

Symptoms

Your ganglion cyst may or may not be painful. Cysts are typically oval or round and may feel soft or very firm. Cysts at the base of the finger on the palm side are usually very firm, often smaller than a pea, and tender to pressure, especially when gripping something. These can make it uncomfortable to hold a pen, grasp a steering wheel, or grip tools.

Cysts at the fingertip just below the nail are often associated with arthritis at that joint. These are called mucous cysts. The chronic pressure from the cyst on the tissue that creates the fingernail can result in a groove or depression in the nail. This groove often resolves when the cyst is treated. Mucous cysts can be confused with warts or nail infections. The overlying skin may become stretched thin and can sometimes break open, causing the thick fluid to leak out. If this happens, gently clean the area and keep it covered until healed. If the opening becomes red, warm, and painful, it may be infected and requires urgent medical attention since the opening communicates directly with the joint.

Causes & Risk Factors

A ganglion cyst can occur in patients of all ages. While the exact cause is unknown, the cysts may form in the presence of joint or tendon irritation, arthritis, mechanical changes, or injury. Some people are simply more prone to developing these cysts than others. The fluid production from the joint or tendon sheath increases, and instead of being reabsorbed, it accumulates in a sac-like structure.

Ganglion cysts can change in size or disappear spontaneously, only to return weeks or months later. They may grow larger with increased activity or shrink with rest. The unpredictable nature of these cysts is one reason why observation is often a reasonable first approach to treatment.

Diagnosis

The diagnosis is usually based on the location of the lump and its appearance. Light often passes through these fluid-filled lumps, which can help confirm the diagnosis during examination. Your hand surgeon may request x-rays to look for evidence of arthritis or other problems in adjacent joints. Ultrasound can be helpful because the uniform appearance of the fluid in the cyst is often characteristic. MRI is useful when a cyst is suspected but cannot be easily felt during the exam.

Your doctor will also ask about your medical history and symptoms. Some important details include when you first noticed the lump, whether it changes in size, what makes it better or worse, and whether it limits your activities or causes pain.

Treatment Options

Treatment for a ganglion cyst can often be non-surgical. In many cases, these cysts can simply be observed, especially if they're painless and not interfering with function. Ganglion cysts may disappear on their own without any treatment. If the cyst becomes painful, limits activity, or is otherwise bothersome, several treatment options are available.

Non-surgical treatments include splints and anti-inflammatory medication to decrease pain associated with certain activities. Aspiration involves placing a needle into the cyst to remove the fluid and decompress it. This can be done in the office, sometimes with ultrasound guidance. The fluid can be quite thick, so sometimes pressure is applied to force the fluid out into the surrounding tissue. While aspiration provides relief, recurrence is common since the cyst wall and stalk remain connected to the joint.

If non-surgical options fail to provide relief or if the cyst keeps coming back, surgery may be recommended. Surgery involves removing the cyst along with its wall and stalk. It may include removing a portion of the joint capsule or tendon sheath to reduce the chance of recurrence. Both open and arthroscopic techniques can yield good results for wrist ganglion cysts. Your hand surgeon will discuss which approach is best for your specific situation.

Surgery: What to Expect

Ganglion cyst removal is typically performed as an outpatient procedure under local anesthesia, with sedation available for select cases if needed. The surgery involves making an incision over the cyst and carefully dissecting it away from surrounding structures, including nerves and blood vessels. The entire cyst, including its stalk where it connects to the joint or tendon sheath, is removed.

After surgery, you'll have stitches and a dressing covering the incision. Most people can move their fingers and wrist gently right away. The area may be sore for a few days to weeks as it heals. Even with complete surgical removal, ganglion cysts can return because we don't fully understand what causes them and there are no known preventions. If a cyst returns and doesn't cause symptoms, it can be left alone. If it returns and causes problems, it can be removed again.

Recovery

Recovery from ganglion cyst removal is generally straightforward. You'll receive a home exercise program to maintain motion and prevent stiffness as you heal. Most people can return to light activities within a few days and resume normal activities within a few weeks once the incision has healed and strength has returned.

Stitches are typically removed about two weeks after surgery. Scar massage and gentle stretching exercises help improve mobility and soften the scar tissue. Most people manage their recovery well with home exercises, though hand therapy is available if you need additional guidance or support.

When to See a Specialist

If you notice a lump on your hand or wrist that's painful, growing, limiting your activities, or causing concern, it's worth getting evaluated. While many lumps turn out to be benign ganglion cysts, an examination can provide certainty and rule out other conditions. Some ganglion cysts are fine to observe, while others benefit from treatment.

Dr. Lackey specializes in diagnosing and treating hand and wrist masses and can help determine whether observation, aspiration, or surgical removal is the right choice for your situation. An evaluation provides peace of mind and a clear path forward.