Our expert says:
Lupus is not an easy disease to diagnose - it can be one of those "grey" diagnoses - one has to look at 11 criteria (http://www.medicinenet.com/systemic_lupus/page3.htm) in combination with blood tests, clinical symptoms etc but not one test will tell you that the patient DEFINITELY has Lupus. It is not impossible that you were diagnosed wrongly the first time. Methotrexate does not cause drug induced Lupus. A rheumatologist is the best specialist to see for this and getting a second opinion if you do not see any improvement on treatment is a good decision.
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