I dunno, Sackster~
My thinking tells me that the hands and feet are where most parasitic maladies (like Lyme) manifest themselves. If we look at that meridian zones or nervous system (most dentrites are in the hands and feet) or circulatory or whatever ya got, and look at the reflexology connection of foot to body (even though we're talking hands here). I think things end up in the hands. Many people have arthritis in the hands first before it spreads to the rest of the body.
You know how they dismiss many 'growths' as over-zealous 'tissue' when most are actually containing organisms...fungus for one. I think this is the case. I never had an injury to my hands to substantiate any kind of growths like this (although I agree with that hypothesis of disease going to prior injuries or weak areas first...probably because it's acidic....)
But we have like a bazillion joints in the hands and with the joints is cartilage and connective tissue. I wonder (and will research it) what it actually is that creates arthritis in joints. It's not the bone itself. I think there are critters that use our resources and congregate there, take it over and that's that.
Nothing is as it seems, ya know?
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xoxoKritts