Objective: Eltrombopag remains a prominent option in the treatment of steroid-dependent or steroid-refractory immune thrombocytopenia (ITP) patients. Unfortunately, not all patients respond to eltrombopag. Antinuclear antibody (ANA) positivity can be seen at rates of up to 30% in ITP patients. Despite being widely used, more markers to predict the response to eltrombopag are still needed. In the present study, we aimed to show the association between ANA positivity and eltrombopag response in ITP patients. Materials and Methods: Patients who were diagnosed with ITP in the Trakya University Faculty of Medicine's Department of Hematology and who underwent eltrombopag treatment due to their resistance to steroids and other treatments were included in our study. ANA measurement was performed by indirect fluorescent antibody method and titers of 1: 160 and above were considered positive. ANA measurements were made before starting eltrombopag. Results: Forty-five patients were included in our study, 33 being women and 12 men. The mean age of the patients was 45.73 years. There were 14 patients with ANA positivity and 31 patients were found to be ANA-negative. Response rates were higher in ANA-negative patients compared to ANA-positive patients in the 1st and 6th months of eltrombopag treatment (p
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