The International Conference on Malignant Lymphoma (ICML) is a crucial event for the scientific community dedicated to the study and treatment of lymphoid neoplasms. Organized by the Foundation for the Institute of Oncology Research (IOR), in partnership with the American Association for Cancer Research (AACR) and in collaboration with the European School of Oncology (ESO), the ICML has led to significant advancements in the field of lymphomas since its inception. The development of the « Lugano Classification » during the ICML, which takes into account new diagnostic imaging techniques, particularly PET, is now widely used worldwide to classify and stage lymphomas.