Impact of reduced chemotherapy treatment for good risk childhood acute lymphoblastic leukaemia on infectious morbidity

P>Reducing infectious morbidity is an important goal to improve childhood acute lymphoblastic leukaemia (ALL) survival. To explore the impact of chemotherapy reduction on infectious morbidity, we compared outpatient and inpatient infectious morbidity of reduced versus intensive (conventional) chemotherapy. One hundred and seventy-one children newly diagnosed with ALL between 2004 and 2007 and treated according to the Dutch Childhood Oncology Group ALL 10 protocol were prospectively followed during the 2-year treatment course. Stratified by minimal residual disease, 54 patients received reduced (standard risk; SR) and 117 patients received intensive (medium risk; MR) intensification/maintenance treatment. SR outpatients had a median of 1 febrile episode versus 4 in MR outpatients (P = 0 center dot 002). SR patients had fewer hospitalizations for fever. They were admitted a median of 0 times, with a median of 0 days of hospitalization, median 0 days of fever, median 0 times chemotherapy interruption and median 0 times intravenous antibiotics. MR patients were admitted for fever median 2 times (P < 0 center dot 001) with 10 days of hospitalization (P < 0 center dot 001), 2 days of fever (P < 0 center dot 001), one chemotherapy interruption (P < 0 center dot 001) and two intravenous antibiotics administration (P < 0 center dot 001). These data indicate that reduced intensification/maintenance compared to conventional intensive intensification/maintenance chemotherapy for good risk childhood ALL resulted in major decrease of infectious morbidity.