title: [Histologic features and pathologic diagnosis in usual interstitial pneumonia].
abstract: OBJECTIVE
  To study the pathologic features, differential diagnosis and role of open lung biopsies (OLB) in usual interstitial pneumonia (UIP).
  
  
  METHODS
  The authors reviewed the pathologic, clinical and radiologic features of five cases of UIP (one autopsy case and four OLB cases), with follow-up information.
  
  
  RESULTS
  The typical histologic features were a non-uniform distribution of alveolar inflammation, fibroblastic foci, interstitial fibrosis and honeycomb change. There also was associated metaplasia of bronchiolar epithelium, type II pneumocyte hyperplasia and accumulation of alveolar macrophages.
  
  
  CONCLUSIONS
  Characteristically, UIP exhibits temporal heterogeneity under low-power light microscopy, which includes changes in both the early and end stages. Open lung biopsy is an important diagnostic adjunct for suitable patients with atypical radiologic features on computerized tomography. Correlation between clinical, radiologic and pathologic findings is also essential for a correct diagnosis.
authors.affiliation: Department of pathology, Peking University First Hospital, Beijing 10034, China. jna4495@hotmail.com
authors.forename: Jia
authors.initials: J
authors.lastname: Na
authors.forename: Ren-gui
authors.initials: RG
authors.lastname: Wang
authors.forename: Guang-fa
authors.initials: GF
authors.lastname: Wang
authors.forename: Ping
authors.initials: P
authors.lastname: Liu
authors.forename: Wan-zhong
authors.initials: WZ
authors.lastname: Zou
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging / Q000473:pathology*; D017563:Lung Diseases, Interstitial / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology*; D012129:Respiratory Function Tests; D014057:Tomography, X-Ray Computed