title: [Pleuropulmonary blastoma of adults: a clinicopathological analysis].
abstract: OBJECTIVE
  To report two cases of pleuropulmonary blastoma (PPB) of adults and improving the understanding of this tumor.
  
  
  METHODS
  The clinicopathological features of two cases of adult PPB were examined by light microscope and an immunohistochemical study.
  
  
  RESULTS
  As a rare malignant mesenchymal tumor, PPB arose from primitive cells of lung, pleura and mediastinum. Consisting of primitive undifferentiated sarcoma cells and few epithelial cells, the tumor was positive for mesenchymal differentiated markers by immunohistochemistry.
  
  
  CONCLUSIONS
  PPB is a rare malignant embryonal tumor. The diagnosis of this tumor is rather difficult since it lacks pathomorphological or immunohistochemical features.
authors.affiliation: Department of Pathology, General Hospital of Guangzhou Military Area, Guangzhou 510010, China. lin_success@tom.com
authors.forename: Qiu-lin
authors.initials: QL
authors.lastname: Liao
authors.forename: Da-yun
authors.initials: DY
authors.lastname: Peng
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
mesh_terms: D000328:Adult; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D010997:Pleural Neoplasms / Q000473:pathology*; D018202:Pulmonary Blastoma / Q000473:pathology*