Overlap syndrome in a 12-year-old girl with systemic lupus erythematosus and anti-oj antibody-positive polymyositis: a case report.

Background: The peculiar presentation of overlap syndrome in children makes precise diagnosis difficult. Children with overlap syndrome may or may not have specific antibodies. We present the case of a 12-year-old girl diagnosed with overlap syndrome of systemic lupus erythematosus (SLE) and juvenile polymyositis (JPM) who tested positive for anti-OJ antibodies.