What is the pathophysiology of digital mucous cysts (DMCs)?

Updated: Jul 31, 2018
  • Author: Murad Alam, MD; Chief Editor: Dirk M Elston, MD  more...
  • Print
Answer

The mechanism of formation of digital mucous cysts is unknown. Currently, it is believed that the cysts arise from mucoid degeneration of connective tissue and that this process, in most cases, involves communication with the adjacent DIP joint and possible coexistence of osteoarthritis. Clinical and radiographic evidence of osteoarthritis is common at the site of the cysts, [1] and the frequent presence of osteophytes and spurring of the DIP joint were recognized in the 1970s. Active connection to the joint space may or may not exist, as the mucoblasts associated with the cyst appear capable of sustaining the process.


Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!