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ObjectivePegylated IFN‐α2a has been reported in two case reports as being efficacious in treating CDA‐I patients. This study aims to assess its efficacy on a series of CDA‐I patients.MethodsStudy sample consisted of seven CDA type 1 transfusion‐dependent patients. They received pegylated interferon alpha‐2a at an initial dose of 90‐180 µg once a week, tapered according to clinical response and side effects. Good response was defined as Hb ≥ 10 g/dL for ≥3 months, partial response was defined as 7 ≤ Hb<10 g/dL for ≥3 months, and no response was defined as HB < 7 g/dL for over 3 months on treatment. Time to response was defined as the time needed to achieve hemoglobin levels ≥ 10 g/dL without transfusion. Patients were evaluated periodically by abdominal ultrasounds to rule out liver adenomas.ResultsFive patients (71%) had a good response to treatment. One patient stopped treatment due to side effects. One patient had partial response. One patient, with more severe phenotype and poor compliance, had poor response to treatment. No abnormal findings were found in ultrasound examination. No effect on serum ferritin level could be established.ConclusionPegylated interferon α2a therapy is efficacious in CDA‐I patients with a reasonable safety profile.

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