My sister is facing some joint pain in knees from sometime so she had a comprehensive arthritis profile test in which esr was high 42mm ( normal is 0-12) but rest other aspects like RF, Anti - CCP and
CRP was negative. I would like to ask the reason of high Esr. What can be the cause ? Also her heamglobin is 11.4(normal 12-16) , eosinophil 0.90 ( normal is 1-7) and RDW - CV is 17.6 ( normal is 11-16). Pls advice. Also can she have arthritis if only esr is high?