Plan your days and make the most of every session, networking opportunity, and special event. Our Annual Meeting agenda is thoughtfully crafted to balance engaging scientific sessions, opportunities for collaboration, and memorable social events. Whether you are joining us in Rotterdam or virtually from around the world, you’ll find each day filled with learning, connection, and inspiration.

Subject to change

BOARD AND COMMITTEE MEETINGS
(* indicates closed meeting)
Saturday, September 26, 2026; Closed meetings only  

0800 - 0900       Education Committee Meeting*  
                                     Scientific Committee Meeting*  - CANCELLED

0900 - 1400       Executive Board Meeting*  

1000 - 1100     LCH in Adults Working Group*

1100 - 1230     HLH Steering Committee Meeting*

1100 - 1230     LCH Steering Committee Meeting* 
 
1100 - 1230     Non-LCH Steering Committee Meeting*

1230 - 1330     Lunch  

1400 - 1500     LCH-IV Study Management Group* 

1400 - 1500     HLH in Adults Working Group*   
 

EDUCATION AND DISCUSSION SESSIONS
Sunday, September 27, 2026

0800 - 1700      Meeting Registration and Check-In 

0830 - 0930    LCH Education Session 
                         Jithma Abeykoon - Systemic therapies in Adult LCH
                         Oliver Tobin - Diagnosis of ND LCH in adults
                         Sarah Elitzur - SLC29A3-Related Disorders: A Genetic Window into Histiocytosis

0930 - 1100    LCH Disease Discussion Session  
                         Carl Allen - Is BRAFV600E the most important factor in LCH? Should we be changing stratification?
                         Ilia Buhtoiarov and Olive Eckstein - Role of 18FDG-PET in LCH management: necessity or 
                         redundancy? and Beyond “Better or Worse”: Toward Standardized LCH Response Assessment for
                         Modern Clinical Trials
                         Gaurav Goyal - Beyond Disease Control: Lifelong Survivorship in Langerhans Cell Histiocytosis

1100 - 1130    Coffee Break 

1130 - 1300    Non-LCH Education and Discussion Session - Non-LCH Histiocytoses in 2026: Diagnostic Precision,
                         Disease Continua, and CNS Challenges
                         Karen Rech - The New Non-LCH Pathology Toolkit: Markers That Matter in 2026
                         Gaurav Goyal, Jennifer Picarsic - The Xanthogranuloma Continuum in Real Life: Pathology, Clinical
                         Vignettes, and Gray Zones
                         Eli Diamond - CNS Non-LCH: What Not to Miss and How to Treat

1300 - 1400      Lunch  

1400 - 1500    HLH Education Session - CNS HLH in Pediatric and Adult Patients
                         Jessica Manson and Aisling Carr - Adult CNS HLH - The neurology spectrum of HLH in adults
                         AnnaCarin Horne - Peds CNS HLH

1500 - 1530      Coffee Break 

1530 - 1700    HLH Disease and MAS Discussion Session  
                         Daniel El Fassi, Adi Lorenz-Zoref, Jessica Manson - Year in Review
                         Shanmuganathan Chandrakasan - Real-World Use of Anti-Cytokine Therapy for HLH - Emapalumab
                         Rui Zhang - Real-World Use of Anti-Cytokine Therapy for HLH - Ruxolitinib

1700 - 1730    Young Investigator/New Member Reception 

1730 - 1930    Welcome Reception  

MAIN MEETING DAY 1
Monday, September 28, 2026

0800 - 1700     Meeting Registration and Check-In 

0830 - 0900     Opening Ceremonies: Histiocyte Society President/Welcome to Rotterdam 

0900 - 1000   Guest Speaker Presentation
                        Ruben van Boxtel - Tracing the Origin of Childhood Cancer

1000 - 1030   Coffee Break 

1030 - 1230     HLH Symposium - MACS are Back in HLH
                         Swaminathan Iyer - Depletion of SIRP+ macrophages in HLH and beyond                   
                         Christoph Kessel - Understanding IL-18 Expression and Signaling in
                         Context of (Hyper)Inflammatory Conditions
                         Timo Van den Berg - Therapeutic targeting of the myeloid CD47-SIRPα ‘don’t-eat-me’ checkpoint in       
                         cancer

1230 - 1330    Lunch     

1230 - 1330   Lunch Session: Targeting SIRP in Secondary HLH: From Disease Biology to a Registrational Program ,
                         Presenter: Kim-Hien Dao, DO, PhD, Chief Medical Officer, Electra Therapeutics

1330 - 1500    Scientific Session I: Oral Presentations 

1500 - 1530     Coffee Break  

1530 - 1700     Scientific Session II: Presidential Symposium

MAIN MEETING DAY 2
Tuesday, September 29, 2026

0800 - 1300      Meeting Registration and Check-In  

0915 - 1000      Speaker: Jon Pritchard Lecture on the Nikolas Symposium - Matthew Collin

1000 - 1030      Coffee Break (Poster viewing) 

1030 - 1230       LCH Symposium             
                          Caroline Hutter - The impact of BRAF V600E on hematopoiesis and its use as a therapeutic target in 
                          Langerhans cell histiocytosis
                          Darren Hargrave - MAPK Inhibition: What Can We Learn from the Experience in Paediatric Glioma
                          Sheila Weitzman - What I Wish I Knew 30 Years Ago

1230 - 1330       Lunch 

1330 - 1500       Scientific Session III: Oral Presentations  

1500 - 1530     Presentation of Late Breaking Abstracts  

1530 - 1545      Coffee Break (Poster viewing) 

1545 - 1700     Poster Presentation Session/"Poster Pitch" Session for Arceci Nominees

1700 - 1800       General Assembly Meeting*

1900 - 0100      Histiocyte Society Annual Banquet – The Boathouse 
                         Closing Ceremonies: Awarding of Scientific Prizes 

Check back often for the most up to date information!