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Advances in Hematology
Volume 2015, Article ID 908708, 5 pages
Clinical Study

Determinants of Overall and Progression-Free Survival of Nigerian Patients with Philadelphia-Positive Chronic Myeloid Leukemia

1Department of Hematology and Immunology, Obafemi Awolowo University, Ile-Ife 234-220005, Nigeria
2Department of Hematology and Blood Transfusion, Obafemi Awolowo University Teaching Hospital Complex, Ile-Ife 234-220005, Nigeria

Received 30 June 2015; Revised 27 August 2015; Accepted 30 August 2015

Academic Editor: Estella M. Matutes

Copyright © 2015 Anthony A. Oyekunle et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. The tyrosine kinase inhibitors have markedly changed the disease course for patients with Ph+ and/or BCR-ABL1+ chronic myeloid leukemia (CML). This study was embarked upon to assess the long-term effects of imatinib therapy on survival in adult Nigerian patients with CML. Methods. All adult patients on imatinib (400–600 mg) seen from July 2003 to December 2010 were assessed. Male/female distribution was 171/101, with a median age of 38 (range, 20–75) years. Overall survival (OS) and progression-free survival (PFS) were determined using the Kaplan-Meier techniques. Results. Of all the 272 patients, 205 were in chronic phase, 54 in accelerated phase, and five in blastic phase, at commencement of imatinib. As at December 2010, 222 were alive. OS at 1 and 5 years was 94% and 63%, while PFS was 89% and 54%, respectively. Similarly, amongst the 205 patients in chronic phase, OS at 1 and 5 years was 97% and 68%, while PFS was 92% and 57%. Conclusion. Imatinib’s place as first-line therapy in the treatment of CML has further been reinforced in our patients, with improved survival and reduced morbidity, comparable with outcomes in other populations.