Systemic arthritis is one of the more rare subtypes of juvenile arthritis and accounts for roughly 10 percent to 20 percent of children with juvenile arthritis.
Isifo sokuqaqanjelwa ngamalungu omzimba ewonke sesinye sezifo ezinqabileyo ezingaphantsi kwesifo sabantwana sokuqaqanjelwa ngamalungu yaye abantwana abaphethwe sesi sifo babalelwa kumyinge we-10 ukusa kuma-20 eephesenti kwabo banesifo sabantwana sokuqaqanjelwa ngamalungu.