By Gianluca Tognon Osteoporosis is a skeletal disorder characterized by low bone mass (osteopenia) and qualitative alterations that are accompanied by an increased risk of fracture. Those called “primitive” forms of osteoporosis develop after menopause (postmenopausal osteoporosis) or with advancing age (senile osteoporosis). Secondary osteoporosis can be caused by a large number of diseases (hyperparathyroidism,