Alendronate increases bone density in chronic spinal cord injury: a case report.

Abstract

Over the first 6 to 16 months after spinal cord injury (SCI), up to a third of bone mass may be lost because of demineralization, resulting in an increased risk for fractures. Studies in postmenopausal women have shown the efficacy of oral alendronate, an aminobisphosphonate, in increasing bone mass. However, the efficacy of alendronate in reversing bone density loss has not been shown in patients with chronic SCI. This article reports on the efficacy of alendronate in increasing bone mass in a patient with neurologically incomplete American Spinal Injury Association class D SCI and Brown-Séquard's syndrome. Bone mass change over 2 years while taking alendronate is compared for a weak extremity (majority of muscles grade 2/5) and strong extremity (majority of muscles grade 4/5) and spine. There was a greater increase in bone mineral density in the weaker lower extremity compared with the stronger one; the spine had the greatest increase overall.