Langerhans cell histiocytosis (LCH) is a systemic disease associated with the proliferation and accumulation (usually in granulomas) of Langerhans cells in various tissues.
Comment:
We follow NCIT in classifying this as a neoplasm but this may be revisited
Synonyms:
exact_synonym:
Langerhan's cell histiocytosis; Langerhans cell granulomatosis; Langerhans cell histiocytosis, NOS; Langerhans cell histiocytosis, Not otherwise specified; histiocytosis X; letterer-Siwe disease involving intra-abdominal lymph nodes; letterer-Siwe disease involving intrapelvic lymph nodes; letterer-Siwe disease involving intrathoracic lymph nodes; letterer-Siwe disease involving lymph nodes of axilla and upper limb; letterer-Siwe disease involving lymph nodes of head, face and neck; letterer-Siwe disease involving lymph nodes of inguinal region and lower limb; letterer-Siwe disease involving lymph nodes of multiple sites; letterer-Siwe disease involving spleen; letterer-Siwe disease of intra-abdominal lymph nodes; letterer-Siwe disease of intrapelvic lymph nodes; letterer-Siwe disease of intrathoracic lymph nodes; letterer-Siwe disease of lymph nodes of axilla and upper limb; letterer-Siwe disease of lymph nodes of axilla and/or upper limb; letterer-Siwe disease of lymph nodes of head, face and neck; letterer-Siwe disease of lymph nodes of head, face and/or neck; letterer-Siwe disease of lymph nodes of inguinal region amd/or lower limb; letterer-Siwe disease of lymph nodes of inguinal region and lower limb; letterer-Siwe disease of lymph nodes of inguinal region and/or lower limb; letterer-Siwe disease of lymph nodes of multiple sites; letterer-Siwe disease of spleen