Objective: To evaluate the presence and characteristics of additional karyotype abnormalities in chronic myeloid leukaemia cases.
Methods: The cross-sectional study was conducted at the Department of Cytogenetics and Molecular Pathology, National Institute of Blood Diseases and Bone Marrow Transplant, Karachi, from May 2010 to September 2016 and comprised diagnosed chronic myeloid leukaemia patients regardless of age and gender. Baseline cytogenetic evaluation was done on overnight, 24-hrs un-stimulated and 72-hrs stimulated bone marrow cultures, and karyotypes were defined according to the International System for Human Cytogenetic Nomenclature2013. Data was analysed using SPSS 23.
Results: There were 222 cases with a median age of 38 years (range: 12-84 years). The male-to-female ratio was 1.8:1. Chronic myeloid leukaemia was detected in 18(8.1%) patients having additional cytogenetic abnormalities. Among the patients found positive, cytogenetic type was minor in 10(55.55%), major 3(16.66%), complex 3(16.66%), and variant 2(11.11%).
Conclusion: Additional cytogenetic abnormalities were found in 8% of the sample.
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