Pigmented villanodular tynosivitis

Has anyone had this? Does it have any association with T1D?

Maybe this ?

Does not appear specific to T1D.
Short version:

Pigmented villonodular synovitis (PVNS), which is now known as tenosynovial giant cell tumor (TGCT), is a condition in which the synovium swells. The synovium is the layer of tissue lining joints like your knee and hip.

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