<prompt> Most common rheumatic disease in children is ___Juvenile idiopathic ahritisJuvenile ankylosing spondylitisSystemic lupus erythematosusMorphea  <response>: The most common rheumatic disease in children is Juvenile idiopathic ahritis JIA, Juvenile idiopathic ahritis represents a homogenous group of chronic disorders charcterized by Ahritis in 1 joint Age at onset: 16 years Duration of disease: 6 weeks Ahritis is clinically defined as: Swelling or effusion, or the presence of 2 or more of the followin signs: Limitation of range of motion Tenderness or pain on motion Increased heat Ref: Nelson textbook of pediatrics 21st edition pgno: 1258 