Caleb Foster
Myxoid cysts, also known as digital mucous cysts, are small, noncancerous bumps that can sometimes grow under the nail bed. They are usually found near the base of the nail on the finger or toe and are associated with underlying health conditions such as osteoarthritis. While myxoid cysts typically do not cause any pain, they can result in nail deformities such as grooves, depressions, or colour changes. In rare cases, they may cause pain if they put pressure on structures like nerves or if they are a result of osteoarthritis. Treatment options include surgical and nonsurgical methods, with surgery having a high success rate.
| Characteristics | Values |
|---|---|
| Common Name | Myxoid cyst |
| Other Names | Digital mucous cyst, mucous pseudocyst, digital myxoid cyst, pseudocyst |
| Appearance | Small, shiny, smooth, skin-coloured, almost translucent, light can shine through |
| Size | 5mm to 1cm across, about the size of a pencil eraser |
| Shape | Round or domed |
| Texture | Firm or filled with jelly-like, sticky fluid |
| Colour | Skin-coloured, translucent, bluish red |
| Location | Most common on the index, middle or ring finger of the dominant hand, near the nail bed |
| Pain | Usually painless, but can be painful if it changes the nail shape or is linked to osteoarthritis |
| Nail Changes | Groove in the nail, split nail, nail loss, colour changes |
| Leakage | Sticky fluid may leak out, clear, yellowish, pinkish, straw-coloured, or blood-stained |
| Treatment | Surgical removal, nonsurgical methods like intralesional photodynamic therapy, repeated needling, injection with steroids or chemicals |
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What You'll Learn
- Myxoid cysts are small, harmless, fluid-filled lumps
- They are associated with osteoarthritis and other degenerative joint diseases
- Cysts can cause nail deformity, including grooves, depressions, and colour changes
- Treatment options include surgery, intralesional photodynamic therapy, and steroid injections
- Cysts are usually not painful, but can be tender if knocked or put under pressure
Myxoid cysts are small, harmless, fluid-filled lumps
Myxoid cysts have a smooth, shiny surface and are usually skin-coloured, almost translucent, or bluish-red. They range in size from 5mm to 1cm across, which is about the size of a pencil eraser. The round or oval bumps may be firm or filled with a jelly-like, sticky fluid called synovial fluid. This fluid surrounds joints and tendons, protecting them from damage during movement. Sometimes, this sticky fluid leaks out and may be clear, yellowish, pinkish, or straw-coloured.
Myxoid cysts rarely cause pain or other symptoms, but they can become tender, especially when knocked. Occasionally, there may also be symptoms of arthritis with pain, stiffness, and deformity of the joint. When a cyst grows over part of the nail, it can cause a groove to develop in the nail or it can split the nail. In rare cases, a myxoid cyst may grow under the nail, and this type of cyst can be painful.
The cause of myxoid cysts is unknown, but they are often associated with underlying health concerns such as osteoarthritis and other degenerative joint diseases. They are often connected to the lining of a nearby joint and are believed to form when the joint lining around the finger or toe joint degenerates. Myxoid cysts occur more frequently in middle-aged people and in those assigned female at birth.
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They are associated with osteoarthritis and other degenerative joint diseases
Myxoid cysts are small, noncancerous bumps that usually form near the nail on the index, middle, or ring finger of a person's dominant hand. They are also known as digital mucous cysts. While they are typically painless, myxoid cysts that grow under the nail are rare and can be painful, depending on how much the cyst changes the nail shape.
Myxoid cysts are associated with osteoarthritis and other degenerative joint diseases. Osteoarthritis is a form of degenerative joint pain. It can cause the lining of your joints to grow excessively. Myxoid cysts are frequently related to underlying health conditions such as osteoarthritis. They are often connected to the lining of a nearby joint. Pain may be present if myxoid cysts stem from osteoarthritis.
Myxoid cysts are not always painful, but they can be tender if they put pressure on other structures, such as nerves. The cyst may also feel tender if a person knocks it. Occasionally, a cyst may also reduce joint movement.
Imaging tests or a biopsy may be requested to confirm a diagnosis, especially if the cyst is located under the nail. An X-ray can show evidence of osteoarthritis. A biopsy can rule out other medical conditions.
There are several treatment options available for myxoid cysts, including both surgical and nonsurgical methods. Surgical removal of the cyst is considered the most effective method, with the least recurrence. Nonsurgical methods include using liquid nitrogen or cryotherapy to freeze and then thaw the cyst, draining the cyst by puncturing it, and injecting the cyst with steroids or chemicals to shrink the volume of fluid. However, with all these options, the cyst could grow back.
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Cysts can cause nail deformity, including grooves, depressions, and colour changes
Myxoid cysts are the most common type of cyst to grow under a nail bed. They are small, noncancerous bumps that usually form near a joint at the end of your finger, most often on the index, middle or ring finger of your dominant hand. They are frequently related to underlying health conditions such as osteoarthritis.
Myxoid cysts can sometimes grow under the nail, creating a depression in the middle of the nail or causing the nail to split. This type of cyst can be painful and may cause a groove to develop down the length of the nail. You may also notice slight depressions or colour changes.
The cysts are caused by the degeneration of connective tissue. They are associated with osteoarthritis and other degenerative diseases, which cause the lining of the joints to grow excessively. Myxoid cysts can also be caused by focal mucinosis, which occurs when abnormal deposits of mucins (mucopolysaccharides) build up in the skin under your finger or toe.
Myxoid cysts can be treated with surgery, which involves cutting away the cyst and covering the area with a skin flap that closes as it heals. There are also non-surgical treatments available, such as draining the cyst and injecting a substance that makes it light-sensitive, then using a laser to burn off the cyst base.
It is important to see a doctor if you are experiencing any pain or changes to your nails, as it could be a sign of an underlying condition.
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Treatment options include surgery, intralesional photodynamic therapy, and steroid injections
Myxoid cysts are small, noncancerous bumps that usually form near a joint at the end of your finger. They are often found near the nail on the index, middle, or ring finger of your dominant hand. While myxoid cysts are typically painless and do not require treatment, they can sometimes grow under the nail bed and cause pain or discomfort. In such cases, treatment may be necessary to alleviate pain and improve nail appearance.
One treatment option for myxoid cysts is surgery, which involves cutting away the cyst and covering the area with a skin flap that closes as it heals. Surgery has a high success rate, ranging from 88% to 100%. However, it may result in scarring, nail deformity, infection, or limited mobility of the joint. Therefore, it is essential to discuss the potential risks and benefits with a doctor or specialist before deciding on this treatment option.
Intralesional photodynamic therapy is another treatment option for myxoid cysts. This procedure involves draining the cyst and injecting a substance that makes it light-sensitive. Then, a laser light is used to burn off the cyst base. A small study showed a 100% success rate with no cyst recurrence after 18 months. Intralesional photodynamic therapy has been found to be a promising option with good clinical and functional results and low long-term recurrence rates.
Steroid injections are also considered a treatment option for myxoid cysts. This method involves injecting a steroid or a chemical that shrinks the fluid in the cyst. Various chemicals can be used, such as iodine, alcohol, or polidocanol. However, this approach has the highest recurrence rate among the mentioned treatments, ranging from 30% to 70%. While steroid injections can reduce the volume of the cyst, their efficacy is controversial, and the effect may wane over time.
Other treatment options for myxoid cysts include repeated needling or drainage of the cyst, carbon dioxide laser treatment, cryosurgery, electrodessication, and infrared coagulation. Some home treatment options have also been suggested, such as applying firm compression to the cyst daily for several weeks. However, it is important to consult a healthcare provider before attempting any treatment, especially for cysts located under the nail, as they can cause pain and affect quality of life.
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Cysts are usually not painful, but can be tender if knocked or put under pressure
Myxoid cysts, also known as digital mucous cysts, are usually not painful. However, they can become tender when knocked or put under pressure. These cysts are small, noncancerous bumps that most often develop near a joint at the end of a finger or toe, frequently relating to underlying health conditions such as osteoarthritis. While they usually appear near a nail, they can, in rare cases, grow under the nail, and this can be painful depending on how much the cyst affects the nail shape.
When a myxoid cyst grows over part of the nail, it can cause a groove to develop in the nail, slight depressions or colour changes, and may even cause the nail to split or result in nail loss. Myxoid cysts that grow under the nail can be identified by these symptoms, as well as by the potential leakage of a sticky, clear, straw-coloured or blood-stained fluid. This fluid is called synovial fluid and it surrounds joints and tendons, protecting them from damage during movement.
Myxoid cysts are not contagious and are usually symptom-free. They are often associated with osteoarthritis in fingers or toes, with an estimated 64-93% of people with osteoarthritis having myxoid cysts. The cysts form when the synovial tissue around the finger or toe joint degenerates, causing the fibroblast cells in the connective tissue to produce too much mucin, an ingredient of mucus. They are more common in females than in males and are most common in adults aged 40 and above, although they can occur at any age.
While myxoid cysts usually do not require treatment, they can be surgically removed if they bother the individual or cause pain. There are also some home treatment options available, such as applying firm compression to the cyst every day for a few weeks, although it is important not to puncture or drain the cyst at home due to the risk of infection.
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Frequently asked questions
A myxoid cyst, also known as a digital mucous cyst or pseudocyst, is a small, noncancerous bump that occurs on the fingers or toes near a nail bed. They are often associated with underlying health conditions such as osteoarthritis.
Myxoid cysts are usually skin-coloured and look almost translucent. They have a smooth, shiny surface and a round or domed shape. They are typically firm to the touch but can also feel fluid-filled.
Myxoid cysts usually don't require treatment. However, if treatment is sought, surgical removal of the cyst is the most effective method. Other treatment options include draining the cyst, injecting it with steroids or chemicals, and cryotherapy.
The exact cause of myxoid cysts is unknown. However, they are believed to form when the connective tissue weakens and degenerates. They are also associated with underlying health conditions such as osteoarthritis.
