Mucous cyst Discussion
A synovial cyst is a collection of the lubricating synovial liquid which
has leaked outside the joint where it is normally contained. When this
process takes place at the end joint of a digit, it is commonly referred to
as a mucous cyst, and is associated with a unique set of problems. Cysts in
this location are almost always due to underlying osteoarthritis. They are
at risk for infection and secondary joint infection because the soft tissue
cover is relatively thin. Nail deformities are common because of local
pressure of the cyst on the nail bed. Nail deformities may occur as a result
of cysts which are not visibly obvious. Surgical treatment is indicated for
enlargement with thinning of the overlying skin or for associated nail
deformities. Surgery usually involves debridement of arthritic joint spurs
as well as removal of the cyst. Surgery has the risks of stiffness, nail bed
deformity and possible recurrence of the cyst, as well as other surgical
risks.
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