Systemic juvenile idiopathic arthritis is classified as an autoimmune entity and a subtype of juvenile idiopathic arthritis, although it has many features of autoinflammatory-type of diseases. This review article will elaborate on the disease’s pathogenesis and its proposed relation to autoinflammatory diseases including defective innate immunity and phagocytosis response leading excessive cytokine release. It also explains the disease’s epidemiology, clinical phenotype, diagnostic challenges, complications and current advancements in the treatment of systemic juvenile idiopathic arthritis, such as IL-1 and IL-6 antagonists and their impact on the disease trajectory. Care of patients with systemic juvenile idiopathic arthritis requires a comprehensive multidisciplinary team to optimize the care and avoid complications of the disease itself such as growth impairment, macrophage activation syndrome or the complications of immunosuppressant and immunomodulatory treatments.
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