Definition:
Also known as a digital mucous cyst or pseudocys, a myxoid cyst is a growth usually tissues and may be associated with osteoarthritis.
Diagnosis:
Your doctor may recommend further testing if the diagnosis is not certain, such as an ultrasound, X-ray, MRI or CT scan.
Treatment:
Referral to a hand or dermatologic surgeon may be required for patients who fail conservative treatments, considering the some myxoid cysts will disappear spontaneously and recurrent rates are high. A number of common treatment options are available such as corticosteroid tape (flurandrenolide), surgical excision, repeated puncture, steroid injections (triamcinolone) and cryosurgery (freezing).
Symptoms and Signs:
The fingers are the most common location for myxoid cysts that are usually found near the base of the nail, slightly off to one side or the other. Myxoid cysts can also occasionally occur beneath the nail or involve the root of the nails, where changes in the nail, such as depressions, grooves or slight color changes may be seen.
Causes:
Myxoid cysts are not derived from the joint or tendon sheath because they are not synovial cysts nor are they ganglia as commonly believed. They also often appear at the site of an old injury, sites of minor trauma and sites of friction.
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