Professor Dr Gan Shiaw Sze @ Gan Gin Gin is a Professor in Internal Medicine and Clinical Haematology, Department of Medicine, Faculty of Medicine, University of Malaya. She graduated with honours from University of New South Wales, Australia and joined the Department of Medicine, University of Malaya as a lecturer in 2000 after obtaining her MRCP (UK) qualification. In addition to this, she is also a fellow of Academy of Medicine, Fellow of Academy of Science, Malaysia and a Fellow of Royal College of Physicians, Edinburgh (UK).  Believing in further improving herself, she obtained a Master’s degree with distinction in Clinical Medicine (Leadership & Management) from the University of Newcastle, Australia in 2017.

She is currently the head of Department of Medicine. She was the head of the division of clinical haematology in Department of Medicine, (2003 to 2018) and was instrumental in the improvement of haematology daycare services and expanding the haematology clinical services including haematopoietic stem cell transplantation in University Malaya Medical Centre. She has also written many guidelines for haematological procedures for University Malaya Medical Centre (UMMC) and spearheaded the well-integrated medical daycare area.

Professor Gan is active in Malaysian Society of Haematology where she was the President of the society (2022-2026), of which she remains as a council member. She previously held the position of vice president (2020-2022), honorary secretary (2004 to 2008) and council member (2008-2018). She has played a key role in shaping the training of clinical haematologists in Malaysia. She was the national chair of the Examination Subcommittee, past chairperson and current committee member of clinical haematology training in Malaysia. In addition, she is also one of the members of Malaysian Medical Council Education Specialty Sub-Committee for clinical haematology. Internationally, she is a respected member in the field of haematology. She the executive board member of Asia Pacific Blood and Marrow Transplantation group and one of the steering committee for Asian Myeloma Network (AMN) and Asia Pacific Myeloma & Related Diseases Registry. 

Professor Gan has contributed much to the transfer of her expertise and knowledge in her capacity as a national committee/panel member for formulating clinical practice guidelines on management of blood disorders and national policies on stem cell transplantation, which have served as reference nationwide. In addition, she has also been a key opinion leader in Asia Pacific region where she is active member for working groups and committees, developing consensus guidelines for management of haematological disorders in resource diverse settings.  She is also actively involved in organizing national conferences and workshops for the continuous professional development for trainees and students. She has been invited to evaluate numerous grants and reviewer for many ISI (WOS) publications.

Her interest in research, especially in genetic polymorphisms associated with haematological related diseases, haematopoietic stem cell transplantation & cellular therapy, lymphoma and myeloma has resulted in numerous publications in peer-reviewed journals. Besides this, she is actively involved in multiple international clinical trials. 

She has been engaged as speaker, chairperson for many workshops/seminars and international conferences. Apart from that, she has also been awarded several times of excellent service awards for her contributions to academic services and clinical services at the University of Malaya.