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Letterer–Siwe disease, (LSD) or Abt-Letterer-Siwe disease, is one of the four recognized clinical syndromes of Langerhans cell histiocytosis (LCH) and is the most severe form, involving multiple organ systems such as the skin, bone marrow, spleen, liver, and lung. Oral cavity and gastrointestinal involvement may also be seen.
Multifocal multisystem LCH, also called Letterer-Siwe disease, is an often rapidly progressing disease in which Langerhans cells proliferate in many tissues. It is mostly seen in children under age 2, and the prognosis is poor: even with aggressive chemotherapy, the five-year survival is only 50%.
[8] [21] Shortly afterwards, Letterer in 1924 and Siwe in 1933 described a fatal condition in children who presented with large livers and spleens, large lymph nodes and bone damage. In 1940, Louis Litchtenstein and Henry L. Jaffe described a self-limiting disease characterised by "isolated bone lesions". [9]
The Histiocyte Society, a nonprofit organization, is a group of more than 200 physicians and scientists from around the world committed to improving the lives of patients with histiocytic disorders by conducting clinical and laboratory research into the causes and treatment of this disease. The Society has instituted several clinical trials and ...
Non-specific inflammatory response, which includes fever, lethargy, and weight loss.This is suspected of being a genetic disorder, and as the name implies, is self healing.
By definition, Langerhans Cell Sarcoma (LCS) is a cancerous disease caused by the uncontrolled overproliferation of Langerhans cells. [ 5 ] Because Langerhans cells are most commonly found in the mucosa and the skin, LCS is thought to usually begin here with further spread to other areas of the body via the lymphatic system.
Indeterminate cell histiocytosis (LCH) is an uncommon proliferative illness where the predominant cells have characteristics from both non-Langerhans cell histiocytosis (NLCH) and Langerhans cell histiocytosis (LCH) in terms of morphology and immunophenotypic characteristics. [1]
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