Dear Colleagues,

On behalf of the European Society for Immunodeficiencies (ESID), the European Hematology Association (EHA), and SIOPE – The European Society for Paediatric Oncology, we are thrilled to invite you to the ESID-EHA-SIOPE Focused Symposium 2025 “The Interplay of Immunology & Haematology”, taking place in the marvellous city of Vienna from 18-20 November 2025.

Why ESID-EHA-SIOPE 2025?

In recent years, the intersection between immunodeficiencies, haematologic conditions, and oncology has become ever more apparent. As we witness increasing complexity in patient diagnoses and treatments, the need for a collaborative, multidisciplinary approach is more critical than ever. This symposium aims to provide a comprehensive platform for exploring how immunodeficiencies can influence hematologic and oncologic conditions and vice versa, and how each specialty offers unique insights that contribute to improving diagnosis, treatment, and management strategies.

This symposium is an important opportunity for fellows, researchers and junior faculty to report and highlight novel basic and clinical information on this interplay of immunodeficiencies and malignant and non-malignant hematological diseases. They are encouraged to submit abstracts related to the keynote topics.

Our mission is simple: to unite our expertise across these vital fields to elevate patient care and outcomes.

This symposium marks a significant milestone in the collaboration between immunologists, haematologists, and paediatric oncologists.

What to Expect at ESID-EHA-SIOPE 2025?

• Multidisciplinary Insights: Dive into the pathophysiological links between immunodeficiencies, haematologic conditions, and oncologic disorders. Engage in discussions about the latest research, as well as best practices for diagnosis and integrated treatment approaches.
• Cross-Field Collaboration: This symposium will bring together experts from immunology, haematology, and oncology. It is a unique opportunity to learn from global leaders, exchange scientific ideas, and collaborate on new methods for improving patient care.
• Research and Scientific Discovery: We invite all researchers to submit abstracts and present their latest scientific findings. This is an excellent opportunity to contribute to the growing body of knowledge in this field and learn about cutting-edge research in immunodeficiencies, hematology, and oncology.

We believe that the ESID-EHA-SIOPE 2025 symposium will be an exciting and invaluable experience for all participants. This event is not only a platform for sharing knowledge but also a celebration of the collective effort of three societies—ESID, EHA, and SIOPE—coming together for one mission: advancing patient care through collaboration and innovation.

We look forward to welcoming you to Vienna in November 2025 for this landmark event. Together, we will pave the way for a brighter future for patients across the globe.

Warm regards,
The Organizing Committee
ESID, EHA, and SIOPE