title: [Clinical and pathological features of 5 adult patients with Langerhans cell histiocytosis].
abstract: OBJECTIVE
  To improve the identification of Langerhans cell histiocytosis (LCH).
  
  
  METHODS
  5 adult cases of LCH treated in our hospital since 1990 were studied, the clinical data and pathological findings were analyzed.
  
  
  RESULTS
  The sex ratio of male to female was 3 to 2, the mean age in this series of 5 patients was 36.8 years. All patients presented with multifocal or disseminated form of the disease. The involved organs included lung, skeleton, central nervous system, skin, liver, spleen and lymph node. The radiographic presentation of lung involvement includes diffuse micronodular densities (1 case), interstitial fibrosis with cyst formation (2 cases), limited infiltration in unilateral lung field (1 case) and isolated mass (1 case). Sharply demarcated bony rarefaction in radiogram was found in 3 cases. The presence of specific Langerhans cell in the focal lesion, which was the pathological basis for the definitive diagnosis of LCH, was detected in all patients. Systemic chemotherapy with corticosteroid and anthracycline based regimen was given to 5 patients and it caused retraction of the enlarged liver and spleen in 1 case, amelioration of lymph nodes and skin involvement in 2 cases and diminution of enlarged thyroid gland in 1 case, while it had less benefit in lung and bone involvement or to diabetes insipidus.
  
  
  CONCLUSIONS
  LCH can be observed in young adults or middle-aged subjects. It should be suspected in patients who presented with diabetes insipidus, characteristic bony lesion and pulmonary involvement. The definitive diagnosis should be made pathologically in time. The proper treatment with low-dose radiotherapy and/or systemic chemotherapy should be taken based on the number and the function of systems involved.
authors.affiliation: Department of Respiratory Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Bai
authors.forename: Longyun
authors.initials: L
authors.lastname: Li
authors.forename: Hongrui
authors.initials: H
authors.lastname: Liu
authors.forename: Hongzhen
authors.initials: H
authors.lastname: Yan
mesh_terms: D000305:Adrenal Cortex Hormones / Q000627:therapeutic use; D000328:Adult; D000903:Antibiotics, Antineoplastic / Q000627:therapeutic use; D017809:Fatal Outcome; D005260:Female; D006646:Histiocytosis, Langerhans-Cell / Q000188:drug therapy / Q000473:pathology*; D006801:Humans; D008099:Liver / Q000187:drug effects / Q000473:pathology; D008198:Lymph Nodes / Q000187:drug effects / Q000473:pathology; D008297:Male; D012867:Skin / Q000187:drug effects / Q000473:pathology; D013154:Spleen / Q000187:drug effects / Q000473:pathology
chemical_list: D000305:Adrenal Cortex Hormones; D000903:Antibiotics, Antineoplastic