Mucous Cyst

Mucous cysts most commonly occur over the most distal joint of the finger.

Mucous Cyst

Mucous cysts most commonly occur over the most distal joint of the finger. Distal interphalangeal (DIP) joint arthritis may cause bone spurs to develop in this area and mucous cysts may form. They usually appear as a bump on either side of the finger joint. They are often tender and fluid filled. The fluid inside the cyst is originating from the DIP joint. You should not attempt to drain the fluid on your own because it is in direct communication with the joint and a serious joint infection could develop.


X-rays may be taken to determine the extent of the arthritis and identify any osteophytes (bone spurs) that have developed. If the mucous cyst is significantly bothersome or threatening to drain, surgical intervention is indicated. Refer to our “Procedures” page for more details on “Mucous Cyst excision”.

Mucous Cyst

Courtesy: www.aaos.org

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