Bilateral:Affecting both sides. For example,bilateralarthritisaffects joints on both the left and right sides of the body. From Healthy Resources 10 Rheumatoid Arthritis Symptoms What Is Exocrine Pancreatic Insufficiency? Life With RRMS: A Shift in Positivity Featured Centers What Are the Best PsA Treatments for You? Understanding Biologics 10 Things People With Depression Wish You Knew Health SolutionsFrom Our Sponsors