Interferon-alpha in the treatment of chronic myeloid leukemia. A summary and an update of the Italian studies.

Six-hundred patients were recruited between 1986 and 1991 for studies of the treatment of Ph positive chronic myeloid leukemia (CML) with interferon-alpha (IFN-alpha). The median survival of the patients who were assigned to treatment with IFN-alpha was 6 years or longer than 6 years, and was more than the survival of the patients who were assigned to conventional chemotherapy. Survival prolongation was significantly related with the achievement of a cytogenetic response. IFN-alpha treatment was not harmful for subsequent allogeneic or autologous bone marrow transplantation.