pigmented villonodular synovitis ( RID3641 )
This relates to case #1247 of Sinus Tarsi bursitis. In this case there is PVNS in the Sinus Tarsi bursa (aka Bursa of Gruber, or Gruberi, depending on what you read). It makes me wonder if most or all of the synovial disorders we see in the sinus tarsi arent really synovial inflammation or proliferation in this space.
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