What’s in a name? Well, if it’s osteoporosis, osteopenia and osteoarthritis, for starters, a shared prefix. “Osteo” means bone, and that matching descriptor also spells confusion for many ...
Everything in between minus one and minus 2.5 is called osteopenia. It's lower than normal, but it's not yet lower enough to be given the word osteoporosis.
Although bone demineralization has been noted in Wilson's disease—which involves pathologic copper accumulation—the exact prevalence of osteopenia and osteoporosis in affected patients is unknown.