title: Prognostic indicators in an aggressive pituitary Crooke's cell adenoma.
abstract: OBJECTIVE
  To investigate prognostic indicators in an aggressive Crooke's cell adenoma of the pituitary.
  
  
  METHODS
  The surgically removed tumor was studied by histology, immunohistochemistry and transmission electron microscopy.
  
  
  RESULTS
  An aggressive invasive sellar tumor removed by repeated surgeries from a 43-year-old woman with pituitary related Cushing's disease was classified as a Crooke's cell adenoma of the pituitary. The application of several cell proliferation markers confirmed the aggressive nature of the tumor.
  
  
  CONCLUSIONS
  The investigation of the present case provides additional evidence that pituitary Crooke's cell adenomas may possess aggressive behavior.
authors.affiliation: Department of Laboratory Medicine and Pathobiology, St. Michaels Hospital, University of Toronto, Toronto, ON, Canada.
authors.forename: K
authors.initials: K
authors.lastname: Kovacs
authors.forename: C C
authors.initials: CC
authors.lastname: Diep
authors.forename: E
authors.initials: E
authors.lastname: Horvath
authors.forename: M
authors.initials: M
authors.lastname: Cusimano
authors.forename: H
authors.initials: H
authors.lastname: Smyth
authors.forename: C Coire M
authors.initials: CC
authors.lastname: Lombardero
authors.forename: B W
authors.initials: BW
authors.lastname: Scheithauer
authors.forename: R V
authors.initials: RV
authors.lastname: Lloyd
mesh_terms: D000236:Adenoma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D000328:Adult; D014408:Biomarkers, Tumor / Q000378:metabolism; D003480:Cushing Syndrome / Q000473:pathology / Q000503:physiopathology; D005260:Female; D006801:Humans; D010911:Pituitary Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D011379:Prognosis
chemical_list: D014408:Biomarkers, Tumor