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Research Article Open access CC BY 4.0

Rare Double Heterozygous of HbD/HbG in a Nigerian: A Case Report

Olusogo Ebenezer Busari, Taiwo Rachael Kotila, Omotola Toyin Ojo

International Journal of Research and Reports in Hematology · pp. 10–15 · Published 17 May 2018

Abstract

Aim: To advocate the use of newer and improved methods towards accurate diagnosis of haemoglobinopathies Case Presentation: A rare case of double heterozygous of HbD/G in a pregnant female Nigerian who had present to the antenatal clinic for routine Haemoglobin electrophoresis. She had previously been diagnosed as HbAS using capillary electrophoresis and HPLC techniques. Discussion: Capillary zone electrophoretograms showed the presence of peaks in zone Hb A, Hb D, C and a small peak in Z1 zone. Bio-Rad D10 chromatogram also indicated the presence of four peaks which are identified as Hb A, Hb D, Hb G, and hybrid of HbD/HbG. A peak in Hb D zone of capillary electrophoresis was due to co-migration of Hb D and Hb G variants. The small peak in Z1 zone indicated the presence of alpha chain variant of HbG. Conclusion: The case exemplifies the need to use more advanced methods, including DNA analysis in order to accurately diagnose haemoglobinopathies in the nation with the largest burden of sickle cell disease.

Haemoglobinopathies haemoglobin electrophoresis heterozygous high performance liquid chromatography

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