Professor Yeo was the Chairman of the Medical Oncology Specialty of the Hong Kong College of Physicians between 2007 and 2013. She is currently professor of the Department of Clinical Oncology, Faculty of Medicine, the Chinese University of Hong Kong and an Honorary Consultant in the Department of Clinical Oncology, Prince of Wales Hospital, Hong Kong. She serves as a member and advisor in various expert panels and committees within the University, the Hong Kong Hospital Authority and various health advisory panels. She has authored and coauthored over 230 papers including Journal of the National Cancer Institute, Lancet, Lancet Oncology, Journal of Clinical Oncology, Hepatology etc. Her main research interests are management of breast, liver and gastric cancer patients as well as hepatitis B virus-related complications in cancer patients.