Summary
Some complement deficiencies predispose to SLE early in life. Currently, there are no known unique physiological or genetic pathways that can explain the variability in disease phenotypes, as is suggested by studies directly and indirectly comparing cohorts of children and adults with SLE. Children present with more acute illness and have more frequent renal, hematologic and central nervous system involvement at the time of diagnosis compared to adults with SLE. Almost all children require corticosteroids during the course of their disease, and many are treated with immunosuppressive drugs. Despite of a general lack of co-morbid conditions, mortality rates remain higher with pediatric SLE compared to aSLE. Children and adolescents accrue more damage as measured by the Systemic Lupus International Collaborating Clinics/American College of Rheumatology Damage Index, especially in the renal, ocular and musculoskeletal organ systems. Conversely, cardiovascular mortality is more prevalent in adults with SLE.