Marjut Leidenius is the Department Head of the Breast Surgery Unit in Comprehensive Cancer Center, Helsinki University Hospital, Finland. She has been active in national and international societies such as the Finnish Society of Surgery, ESSO (European Society of Surgical Oncology) and EUSOMA (European Society for Breast Specialists). She is currently the ESSO Honorary Secretary and EUSOMA Board member. She has also been the Chair of the Breast Surgery Division in UEMS Section of Surgery from 2009 to 2016.
Marjut Leidenius has published more than 100 original research and review articles in peer reviewed national and international journals. She is also the Associate Editor for Breast Cancer in European Journal of Surgical Oncology (EJSO).