The Histiocyte Society Annual Meeting is the premier global gathering for clinicians, researchers, trainees, and partners dedicated to advancing the understanding and treatment of histiocytic disorders. Taking place September 26–29, 2026 in the vibrant port city of Rotterdam, this flagship event brings together experts from around the world to share the latest scientific discoveries, discuss complex clinical cases, and foster meaningful collaboration across disciplines. Through a dynamic program of research presentations, educational sessions, working group discussions, and networking opportunities, the Annual Meeting provides a unique forum for advancing knowledge and strengthening the international community working to improve outcomes for patients with histiocytic diseases.

We invite clinicians, scientists, trainees, and industry partners to join us for several days of learning, connection, and collaboration in one of Europe’s most innovative and dynamic cities.