How is Langerhans cell histiocytosis (SS-LCH) staged?

Updated: Jun 12, 2020
  • Author: Christopher R Shea, MD; Chief Editor: William D James, MD  more...
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The Histiocyte Society stratifies patients with Langerhans cell histiocytosis (LCH) into single-system LCH (SS-LCH) or multisystem LCH (MS-LCH).

SS-LCH includes involvement of one of the following systems (either unifocal or multifocal involvement):

  • Bone

  • Skin

  • Lymph Node

  • Lungs

  • Central nervous system

  • Other (eg, thyroid, thymus)

MS-LCH is defined as involvement of 2 or more organs or organ systems, irrespective of involvement of "risk organs." The following organ systems are classified as risk organs, and their involvement indicates a worse prognosis [52] :

  • Spleen

  • Liver

  • Hematopoietic system

  • Lung

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