Find detailed, up-to-date information for many common and rare types of adult-onset cancer, and learn about how we support and care for our adult cancer patients before, during and after treatment.
Histiocytosis is a group of rare diseases that most often affect young children, but can occur at any age. These diseases both feature abnormal growth and accumulation of certain cells of the immune system. The histiocytoses are not considered cancers, although they can be life-threatening and treatment often involves chemotherapy.
