Outcome of adult acute lymphoblastic leukaemia following induction chemotherapy with modified MRC UKALL XII/ECOG E2993 protocol

Cure rates for adult acute lymphoblastic leukaemia (ALL) in developing countries are significantly lower because of problems unique to these countries. Recent studies have reported complete response rates for any induction regimen of more than 90% in adult ALL patients. This study was conducted to evaluate the response rate of induction chemotherapy in adult ALL patients in the Department of Haematology, Bangabandhu Sheikh Mujib Medical University, from January 2007 to December 2008. In this observational study, 35 newly diagnosed ALL patients classified either as L1/L2 according to French-American-British (FAB) classification, aged between 15 to 60 years were assigned for induction therapy with modified MRC UKALL XII/ECOG E2993 protocol. But ultimately 30 patients completed therapy and available for statistical analysis. Among the studied 30 cases 12(40%) patients after phase 1 and overall 24(80%) patients after phase 2 induction therapy, achieved morphologic complete remission (CR). After phase 2 therapy 6(20%) patients fell in the group of non responders (NR) as the blast percentage was ≥5% at the time of bone marrow evaluation. This study shows the response rates in adult ALL with induction therapy slightly below the anticipated response rates of developed countries which may be due to little modification of the original protocol.