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Stages of LCH

Key Points

  • There is no staging system for Langerhans cell histiocytosis (LCH).
  • Treatment of LCH is based on where LCH cells are found in the body and how many body systems are affected.

There is no staging system for Langerhans cell histiocytosis (LCH).

The extent or spread of cancer is usually described as stages. There is no staging system for LCH.

Treatment of LCH is based on where LCH cells are found in the body and how many body systems are affected.

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:


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