# International Rare Histiocytic Disorders Registry (IRHDR)

> **NCT02285582** · — · RECRUITING · sponsor: **The Hospital for Sick Children** · enrollment: 400 (estimated)

## Conditions studied

- Rare Histiocytic Disorders (RHDs)
- Erdheim-Chester Disease (ECD)
- Rosai-Dorfman Disease (RDD)
- Xanthogranuloma Family (XG)
- Indeterminate Dendritic Cell Histiocytosis
- Malignant Histiocytic Neoplasm (MHN)
- ALK-positive Histiocytosis
- Mixed Histiocytosis (MXH)
- Multicentric Reticulohistiocytoma (MRH)
- Necrobiotic Xanthogranuloma (NX)

## Interventions

- **OTHER:** Registry study

## Key facts

- **NCT ID:** NCT02285582
- **Lead sponsor:** The Hospital for Sick Children
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** RECRUITING
- **Start date:** 2014-10
- **Primary completion:** 2028-09
- **Final completion:** 2028-09
- **Target enrollment:** 400 (ESTIMATED)
- **Last updated:** 2025-06-24


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT02285582

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT02285582, "International Rare Histiocytic Disorders Registry (IRHDR)". Retrieved via AI Analytics 2026-07-04 from https://api.ai-analytics.org/clinical/NCT02285582. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*