This paper provides an overview of the EONS (European Oncology Nursing Study) core curriculum revision project. The aim of this project was to revise the EONS core curriculum for a Post-Basic Course in Cancer Nursing, first published in 1989, so that it would better reflect patient and family need and contemporary cancer nursing practice. A further aim of the project was to address the educational needs of both adult and paediatric oncology nurses. To achieve these aims a core curriculum revision meeting was organized and attended by representatives from most of the EU Member States. A rough draft of the core curriculum was developed, circulated and subjected to further scrutiny and modification. Following approval of the final draft, the core curriculum was translated from English into the 10 other official EU languages and made available in both paper and electronic form. The updated core curriculum was launched during the ECCO-10 conference and has now been disseminated widely amongst European cancer nurses and the wider nursing and medical community.