[Osteoporosis in young people].

Osteoporosis in young people is divided into idiopathic juvenile osteoporosis and secondary osteoporosis. Idiopathic juvenile osteoporosis is a rare, self-limited disease characterized by its recover after 3 or 4 years from the incidence. In severe type of idiopathic juvenile osteoporosis, the deformity of spine and extremities due to numerous vertebral and metaphyseal fractures and frequent long bone fractures makes a limitation of daily activities. On the treatment it is important to take care not to make deformity. Idiopathic juvenile osteoporosis is very rare in Japan and unknown cause, is necessary to make more researches in its cause. Many disease are known to cause secondary osteoporosis. And the patients number of secondary osteoporosis are much more than idiopathic juvenile osteoporosis. In secondary osteoporosis, of cause, it is most important to treat the original disease. The treatment of secondary osteoporosis is made a great difference by patient condition. Osteoporosis in young people makes deformity of spine and extremities and height loss, and influences the growth and development for serious disorder. It is necessary for treatment of these young people to take care to make the disorder to minimum.