title: Methorexate therapy in a patient with rheumatoid arthritis complicated by idiopathic thrombocytopenic purpura.
abstract: The association of rheumatoid arthritis (RA) and immune thrombocytopenic purpura (ITP) has been reported rarely. Methotrexate, which is used for RA treatment, causes thrombocytopenia. Therefore, in medical practice, physicians avoid using methotrexate for RA in patients who have both RA and ITP. Here, we report an RA case that also had ITP, which did not decrease in platelet count after methotrexate therapy. A 50-year-old woman was diagnosed with diabetes mellitus in 1990, RA in 1995, and ITP in 2000. She had received hydroxychloroquine for more than 5 years. She was treated with prednisolone 16 mg/daily between 2006 and 2007, but she discontinued this therapy because of weight gain. Laboratory findings were not remarkable, except for thrombocytopenia. We started methotrexate therapy 10 mg per week for treatment of RA, and hydroxychloroquine therapy was stopped due to nonresponse. The methotrexate dose was increased up to 15 mg/week. Her complete blood cell count was monitored frequently. We did not observe any decrease in platelet count, while active arthritis symptoms of the patient were relieved. This case shows that methotrexate may be used in patients diagnosed with RA that is associated with ITP under strict monitoring.
authors.affiliation: Department of Internal Medicine, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey.
authors.forename: Sabiha
authors.initials: S
authors.lastname: Komoğlu
authors.affiliation: Department of Physical Therapy, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey.
authors.forename: Duygu
authors.initials: D
authors.lastname: Silte
authors.affiliation: Department of Internal Medicine, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey.
authors.forename: Meltem
authors.initials: M
authors.lastname: Sertbaş
authors.affiliation: Department of Internal Medicine, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey.
authors.forename: Yaşar
authors.initials: Y
authors.lastname: Sertbaş
authors.affiliation: Department of Internal Medicine, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey.
authors.forename: Ali
authors.initials: A
authors.lastname: Özdemir
keywords: Rheumatoid arthritis; immune thrombocytopenic purpura; methotrexate