OR Association

Is an advocacy group located in Spain. They fight to improve the quality of life of children and adolescents diagnosed with Langerhans Cell Histiocytosis and their families.

Histio UK

Is dedicated to promoting scientific research to uncover the causes of histiocytic diseases and ensure early diagnosis, effective treatment, and a cure.

Histiocytosis Association of Canada

Iis a vocal advocate to promote public and professional education, patient and family support, and stimulation and support of research.

Histiocytosis Association

Is a global nonprofit organization dedicated to addressing the unique needs of patients and families dealing with the effects of histiocytic disorders, that connects patients and medical communities around the world with the resources needed every step of the way...