Pigmented villonodular synovitis (PVNS) is a proliferative disorder of the synovium.
There are two forms described, localized and diffuse, which are likely both ends of a spectrum of ...
History of associated trauma is unusual.
Symptoms are often vague, may be intermittent, and are typically slowly progressive.
Swelling and stiffness out of proportion to ...
Surgery is treatment of choice.
Localized PVNS: Arthroscopic partial synovectomy of lesion with margin of healthy synovium is recommended 2,3[A]:
Lesions in anterior compartment allow for surg...
No clear-cut guidelines
Recurrence is common especially with diffuse PVNS.
Consider monitoring with MRI.
Rodriguez-Merchan EC. Review article: open versus arthroscopic synovectomy for pigmented villonodular synovitis of the knee. J Orthop Surg (Hong Kong). 2014;22(3):406–408.
Insidious onset, not usually associated with trauma
Symptoms can be vague with swelling and stiffness out of proportion to pain.
Aspirate may be blood-tinged and show hemosiderin pigment...
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