Childhood Langerhans Cell Histiocytosis with Risk Organ Involvement

**Semantic type:** Neoplastic Process

**Definition:** Langerhans cell histiocytosis that occurs during childhood and involves the bone marrow, spleen, liver, or lung.

**Synonyms:** - High Risk Childhood Langerhans Cell Histiocytosis - High-Risk Childhood Langerhans Cell Histiocytosis