title: CT features of retroperitoneal neurilemmoma.
abstract: OBJECTIVE
  The aim of this study was to characterize the CT features of retroperitoneal neurilemmoma.
  
  
  METHODS
  The CT findings were reviewed in seven patients with retroperitoneal neurilemmoma.
  
  
  RESULTS
  All of the tumours were well-demarcated round or oval masses. In five cases, heterogeneous contrast enhancement was noted after contrast medium administration. Areas of minimal enhancement reflected diffuse edema in one tumour. Areas without definite enhancement represented prominent cyst formation in three tumours. There were three cases with tumour calcification (two with punctate calcification and one with mottled calcification).
  
  
  CONCLUSIONS
  CT findings may suggest the diagnosis of retroperitoneal neurilemmoma preoperatively.
authors.affiliation: Department of Radiology, Sendai City Hospital, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kinoshita
authors.forename: H
authors.initials: H
authors.lastname: Naganuma
authors.forename: K
authors.initials: K
authors.lastname: Ishii
authors.forename: H
authors.initials: H
authors.lastname: Itoh
mesh_terms: D000328:Adult; D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging; D003287:Contrast Media / Q000008:administration & dosage; D003560:Cysts / Q000000981:diagnostic imaging; D004487:Edema / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000000981:diagnostic imaging*; D011856:Radiographic Image Enhancement; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media