PHILADELPHIA (EGMN) - Children followed for an average of 14 years after diagnosis of juvenile idiopathic arthritis showed no increased risk of invasive cancers, according to a study of more than 1,000 patients. Studies have shown an increased risk of malignancy - particularly lymphoma and lung cancer — in adult rheumatoid arthritis patients. This is the first assessment of cancer risk in children, Dr. Ann Clarke said at the annual meeting of the American College of Rheumatology. In this study, the...