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Keywords:

  • gemtuzumab ozogamicin;
  • acute promyelocytic leukaemia;
  • PML;
  • RARα;
  • molecular remission;
  • CD33

We report a patient with acute promyelocytic leukaemia (APL) who received two doses of gemtuzumab ozogamicin for advanced disease. Previous treatments included front-line all-trans retinoic acid and anthracyclines, polychemotherapy consolidation, salvage chemotherapy for the first relapse followed by autologous stem cell transplantation (ASCT), arsenic trioxide for the second relapse followed by a second ASCT and then high-dose methotrexate for more advanced systemic disease with central nervous system involvement. The patient achieved prolonged haematological and molecular remission after monotherapy with gemtuzumab ozogamicin given at the time of the third relapse.