What is the role of blood testing in the diagnosis of juvenile idiopathic arthritis (JIA)?

Updated: Jul 25, 2019
  • Author: David D Sherry, MD; Chief Editor: Lawrence K Jung, MD  more...
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Answer

Lymphopenia is not uncommon because of emigration of activated lymphocytes out of the circulation into synovium. However, neutropenia is uncommon and, particularly with lymphocytosis or thrombocytopenia, raises the possibility of acute lymphocytic leukemia.


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