Definition: The definition of osteoporosis is decreased density of normal bone. Unlike conditions such as osteomalacia or Rickets, the mineralization of bone is normal in osteoporosis. Osteoporosis causes a decrease in bone mass, often referred to as thinning of bone. When this occurs, the patient with osteoporosis will have weaker bones and have a higher risk of bone fracture.
There are two main categories of osteoporosis, Type I and Type II. Type I osteoporosis occurs only in post-menopausal women, and is due to estrogen deficiency. Type II osteoporosis occurs in both men and women (about two times more frequently in women), and is due to aging, and calcium deficiency over many years.
For more information: Osteoporosis
