Barbara Bain is a Professor of Diagnostic Haematology at St Mary's Hospital Campus, Imperial College Faculty of Medicine. She is also a Consultant Haematologist at St Mary's Hospital, London, UK. Her research has been focused on morphology of blood cells, ethnic and biological differences in haematological variables and cytogenetics and molecular genetics in relation to haematological malignancy. She has collaborated with numerous experts in the field and contributed to the WHO Classification of Tumours of Haemopoietic and Lymphoid Tissues.