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Mucous Cyst Finger

Overview


A myxoid cyst, or digital mucous cyst, is a small, noncancerous bump most often found near a joint at the end of your finger. They're frequently related to underlying health conditions such as osteoarthritis. Myxoid cysts usually don't require treatment.

Most myxoid cysts occur in people between the ages of 40 and 70, but they may be found in all ages. Twice as many women as men are affected.



Symptoms of Mucous Cyst

A mucous cyst is found on the outer most joint of the finger, on the upper side where the nail is. It is usually visible just underneath the skin on the finger, sometimes having caused the skin to thin over the top. The cyst is a small bump, filled with clear fluid, but with a tough outer layer, limiting the movement of it, and feeling quite firm to the touch, unlike a blister or other such complaint.

In most cases of mucous cyst, the issue is not painful and quite often causes little to no problem or dysfunction. If the cyst begins to cause pain or dysfunction for the patient, or has recurrent drainage, or seems to be at risk of rupturing, then a doctor will assess the situation and decide on the treatment needed.



Causes of Mucous Cyst

Mucous Cyst is commonly related to osteoarthritis affecting the joint where the cyst develops. Though it is not known exactly how they develop, it is thought that the cysts are formed when connective tissue that connects the tendons in the finger, wears away. When is happens, is it thought that collagen from the degenerated connective tissue is left behind and begins to collect in pools which then form cysts.

Since mucous cyst is most often found in relation to patients suffering from osteoarthritis, the main group of people at risk of this condition is patients between 50 to 70 years old.

It is possible that over time, these cysts will change in size or disappear completely without surgical removal. It is important to note that this type of cyst is not in danger of becoming cancerous or of spreading to any other area.


Diagnosis of Mucous Cyst

Despite the low risk for patients with suspected mucous cyst, it is recommended that a clear diagnosis be made by a doctor, to assess the condition and examine for any other underlying or related issues. Diagnosis of mucous cyst is relatively simple for most doctors or hand specialists. A doctor will examine the fingers and discuss the history of the issue with the patient.

Since mucous cyst is most commonly related to the condition of arthritis, if the patient has never been diagnosed with this, a doctor will do a full assessment to determine if the root cause is an arthritic issue or if the cyst is simply an anomaly.

The doctor may also order an X-ray to examine the joint in the case of osteoarthritis to understand the level of joint degeneration. In the case where arthritis has not been previously diagnosed, the X-ray will confirm this also.



Treatment for Mucous Cyst

Often, the appropriate method of treatment for mucous cysts is to observe the cyst over time, paying attention to worsening symptoms or the possibility of it rupturing.

It is important for the patient to resist puncturing the cyst themselves, due to high risk of infection and lack of understanding on how to do this properly. If the cyst is becoming painful or close to rupturing, it is advised to be seen by a doctor who can take the next step in treating the issue.

If the cyst does rupture, it needs medical attention. At the base of the cyst is a stem connected to the joint, and when the cyst ruptures, it leaves a path directly into the joint that exposes it to possibility of deep infection inside the joint. In this case, a doctor will prescribe antibiotics that should be applied directly onto the site of the rupture, and the finger should be wrapped in a dressing. It is likely that a doctor will also prescribe oral antibiotics in addition. If the joint still develops an infection, the next step will be surgery.



Nonsurgical

1.Infrared coagulation.This procedure uses heat to burn off the cyst base. A 2014 review of the literature showed the recurrence rate with this method to be 14 percent to 22 percent.

2.Cryotherapy.The cyst is drained and then liquid nitrogen is used to alternately freeze and thaw the cyst. The objective is to block any more fluid from reaching the cyst. The recurrence rate with this procedure is 14 percent to 44 percent. Cryotherapy may be painful in some cases.

3.Carbon dioxide laser.The laser is used to burn off (ablate) the cyst base after it’s been drained. There’s a 33 percent recurrence rate with this procedure.

4.Intralesional photodynamic therapy.This treatment drains the cyst and injects a substance into the cyst that makes it light-sensitive. Then laser light is used to burn off the cyst base. A small 2017 study (10 people) had a 100 percent success rate with this method. There was no cyst recurrence after 18 months.

5.Repeated needling.This procedure uses a sterile needle or knife blade to puncture and drain the myxoid cyst. It may need to be done two to five times. The cyst recurrence rate is 28 percent to 50 percent.

6.Injection with a steroid or a chemical that shrinks the fluid (sclerosing agent).A variety of chemicals may be used, such as iodine, alcohol, or polidocanol. This method has the highest recurrence rate: 30 percent to 70 percent.



Surgical

Surgical treatments have a high success rate, ranging from 88 percent to 100 percent. For this reason, your doctor may recommend surgery as a first-line treatment.

Surgery cuts the cyst away and covers the area with a skin flap that closes as it heals. The sizeTrusted Source of the flap is determined by the size of the cyst. The joint involved is sometimes scraped and osteophytes (bony outgrowths from the joint cartilage) are removed.

Sometimes, the surgeon may inject dye into the joint to find (and seal) the point of fluid leakage. In some cases, the flap may be stitched, and you may be given a splint to wear after surgery.

In surgery and in nonsurgical methods, scarring that cuts the connection between the cyst area and the joint prevents more fluid from leaking to the cyst. Based on his treatment of 53 people with myxoid cysts, one researcherTrusted Source has argued that the scarring can be accomplished without the need for cyst removal and a skin flap.














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