Myxoid Cyst: Causes, Symptoms and Treatment

A myxoid cyst is a small, benign lump that occurs on fingers or toes, near a nail.

Most myxoid cysts occur in people aged 40 to 70, and the affected women are twice as many as men.


In some cases, injury to the finger or toe may cause a cyst for people under 30. A few people may develop myxoid cysts because of repetitive finger motion.

The exact cause of myxoid cysts is unknown currently, but there are two explanations.

  • The cyst forms when the synovial tissue around the finger or toe joint degenerates.
    This is associated with osteoarthritis and other degenerative joint diseases.
  • The cyst forms when the fibroblast cells in the connective tissue produce too much mucin (an ingredient of mucus).


Myxoid cysts are:

  • small round or oval bumps
  • up to 1 cm in size
  • smooth
  • firm or fluid-filled
  • not usually painful, but the nearby joint may have arthritis pain
  • skin-colored, or translucent
  • slow-growing

Myxoid cysts usually occur in the middle or index finger, near the nail.

When a cyst grows over a part of the nail, it can cause a groove in the nail or split the nail. Sometimes it may cause nail loss.


Most myxoid cysts have no pain. Unless you’re unhappy with your cyst’s appearance, treatment is not necessary. You may just want to keep an eye on your cyst though it rarely shrinks and resolves on its own.

In many cases the cyst grows back after treatment, meanwhile, some treatments may:

  • leave scars
  • involve pain or swelling
  • decrease joint range of motion

Here are some treatments:

  • Nonsurgical:
  1. Infrared coagulation.
  2. Cryotherapy.
  3. Carbon dioxide laser.
  4. Intralesional photodynamic therapy.
  5. Repeated needling.
  6. Injection with a steroid or a chemical that shrinks the fluid (sclerosing agent).
  • Surgical:
    Surgical treatments have a high success rate, ranging from 88 percent to 100 percent. Surgery cuts the cyst away and covers the area with a skin flap that closes as it heals. In surgery methods, scarring that cuts the connection between the cyst area and the joint prevents more fluid from leaking to the cyst.

Consult your doctors if you have any symptoms.Myxoid Cyst: Causes, Symptoms and Treatments

Keywords: myxoid cyst; causes, symptoms and treatments of a myxoid cyst.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.