Also called synovial cyst, it is a lump or «lump», which usually appears more frequently in the hands and feet of young women. They are painless, soft and mobile because they do not adhere to nearby structures. They usually have a variable size that goes from that of a chickpea to that of a walnut.
Except for the bulk that is clearly visible and palpable they do not usually produce symptoms although they can be annoying when they affect certain areas such as: joint flexures or areas that are in contact with shoes or intervene in the manual grip.
These cysts are formed from the synovial sheaths of the tendons and joints. They are due to a weakness in the wall of these sheaths that causes the joint fluid to accumulate inside these weakened areas and herniate through the structures that are above making prominence in the skin.
In many cases, patients prefer not to be treated. Generally, patients who want to treat themselves usually do so because of discomfort when interfering with their daily activity, or for aesthetic reasons. The treatment can be performed by manual crushing, evacuation of the contents by needle or surgical removal. In any case they reappear with certain frequency.