You are a wealth of knowledge. Wow.

All I know is that my uncle had it (my dads brother - paternal side) after carpal tunnel surgery.

My mom has all kinds of other problems. Lived through cancer 3x's, her lungs fill with fluid, car accident caused broken back, she might actually have RSD now (in my opinion - the docs haven't said it) she complains of extreme pains in her back to this day.