Where does “scaphotrapeziotrapezoidosteoarthritis” come from?

scaphotrapeziotrapezoidosteoarthritis (English) comes from English trapezium, from Late Latin trapezium, from Ancient Greek τραπέζιον, from Ancient Greek τράπεζα, from Ancient Greek *τετράπεζα, from Ancient Greek πέζα, from Ancient Greek πούς, from Proto-Indo-European pṓds — to walk, to step; to stumble, to fall.

scaphotrapeziotrapezoidosteoarthritis (English): a thumb basal joint arthritis