Stages of LCH
Key Points for This Section
LCH is described as single-system disease or multisystem disease, depending on how many body systems are affected:
- Single-system LCH: LCH is found in one part of an organ or body system (unifocal) or in more than one part of that organ or body system (multifocal). Bone is the most common single place for LCH to be found.
- Multisystem LCH: LCH occurs in two or more organs or body systems or may be spread throughout the body. Multisystem LCH is less common than single-system LCH.
LCH may affect low-risk organs or high-risk organs:
- Low-risk organs include the skin, bone, lungs, lymph nodes, gastrointestinal tract, pituitary gland, and central nervous system (CNS).
- High-risk organs include the liver, spleen, and bone marrow.