Langerhans’ cell histiocytosis presenting as a parotid gland mass is extremely rare. We report a case of Langerhans’ cell histiocytosis in the parotid gland that occurred in a 34-year-old Korean male. The patient underwent parotidectomy followed by adjuvant chemotherapy. There has been no evidence of local recurrence or disease progression during 20 months after the lesion was first diagnosed. ...

Langerhans’ cell histiocytosis may cause irreversible respiratory failure due to progressive destruction of lung parenchyma and widespread cystic change. Transplantation oVers a therapeutic option. A case is described of recurrence of Langerhans’ cell histiocytosis which was associated with deterioration in lung function four years following bilateral lung transplantation. Patients transplanted...

This chapter reviews the clinical presentation, histopathology, immunoprofile and molecular features of Langerhans cell neoplasms of the skin including Langerhans cell histiocytosis (LCH) and its malignant counterpart, Langerhans cell sarcoma (LCS). Biopsy of the skin is a useful method to confirm LCH/LCS diagnosis, as cutaneous involvement is seen in more than 50% cases. Skin can be the only p...

Langerhans’ cell histiocytosis may cause irreversible respiratory failure due to progressive destruction of lung parenchyma and widespread cystic change. Transplantation oVers a therapeutic option. A case is described of recurrence of Langerhans’ cell histiocytosis which was associated with deterioration in lung function four years following bilateral lung transplantation. Patients transplanted...

BACKGROUND The hierarchical organization of hematopoiesis with unidirectional lineage determination has become a questionable tenet in view of the experimental evidence of reprogramming and transdifferentiation of lineage-determined cells. Clinical examples of hematopoietic lineage plasticity are rare. Here we report on a patient who presented with an acute B-lymphoblastic leukemia and develope...

Accepted 29 March 1996 In 1953, Lichtenstein introduced the unifying term 'histiocytosis X' to embrace several previous eponyms, including eosinophilic granuloma, Letterer-Siwe disease and Hand-Schuller-Christian disease.' In 1987, a more prominent designation, Langerhans cell histiocytosis (LCH), was recommended to replace histiocytosis X.' The term is more appropriate as it reflects the fact ...

Langerhans cells are the dendritic cells typical of stratified squamous epithelia and enjoy an intermediate state of differentiation as dendritic cells, since they are very efficient in uptaking and processing antigens but poor in presenting them to lymphocytes. These cells, and other dendritic cells as well, differentiate from bone marrow precursors, with circulating monocytes as intermediates...

Nine normal adult and seven normal infant human corneas were studied for the presence of dendritic epithelial Langerhans cells in a masked fashion. Epithelial flatmounts were separated from the underlying corneal stroma using EDTA. The epithelial Langerhans cell densities were determined in the limbus as well as the peripheral, pericentral, and central corneal regions following staining with AT...