systemic lupus erythematosus
(sis-TEH-mik LOO-pus AYR-ih-THEE-muh-TOH-sus)
A chronic, inflammatory, connective tissue disease that can affect the joints and many organs, including the skin, heart, lungs, kidneys, and nervous system. It can cause many different symptoms; however, not everyone with systemic lupus erythematosus has all of the symptoms. Also called lupus and SLE.