title: [Pathological analysis of metastatic brain tumors misdiagnosed with MRI].
abstract: OBJECTIVE
  To study the pathological basis of metastatic brain tumors misdiagnosed with (MRI).
  
  
  METHODS
  Seven cases were analyzed histopathologically and immunohistochemically, compared with the MRI image.
  
  
  RESULTS
  All the tumors were single large noduls. Hemorrhage and necrosis of the tumors were seen in all the cases. Cystformation of the tumor, glial cell proliferation and vascular proliferation of peritumoral brain tissues were seen in most cases.
  
  
  CONCLUSIONS
  The secondary changes of metastatic brain tumors and the reactive changes of peritumoral brain tissues are the major causes of MRI misdiagnosis.
authors.affiliation: Department of Pathology, Xiangya School of Medicine, Central South University, Changsha 410078, China.
authors.forename: Chang-li
authors.initials: CL
authors.lastname: Zheng
authors.forename: Chun-yan
authors.initials: CY
authors.lastname: Fu
authors.forename: Kang-xin
authors.initials: KX
authors.lastname: Hu
mesh_terms: D000230:Adenocarcinoma / Q000175:diagnosis / Q000473:pathology / Q000556:secondary; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000556:secondary*; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000473:pathology / Q000556:secondary; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged