Osteopenia:Mild thinning of thebonemass. Osteopenia represents a low bone mass and is not as severe as osteoporosis. Osteopenia results when formation of new bone (osteoidsynthesis) is not sufficient to offset normal bone loss (osteoidlysis). From Healthy Resources Is Your Back Pain Ankylosing Spondylitis? Osteoporosis: Bone Fracture Protection Featured Centers What Are the Best PsA Treatments for You? Understanding Biologics 10 Things People With Depression Wish You Knew Health SolutionsFrom Our Sponsors Shot-Free MS Treatment Your Child and COVID-19