title: [Prospective comparison of ultrasound endoscopy and computed tomography in the assessment of locoregional invasiveness of malignant ampullar and pancreatic tumors verified surgically].
abstract: OBJECTIVE
  To compare, in a prospective study, results of endoscopic ultrasonography and computed tomography in staging of pancreatic and ampullary carcinoma tumours, assessed surgically.
  
  
  METHODS
  From January 1990 to May 1993, 37 patients with pancreatic tumours had per-operative endoscopic ultrasonography and computed tomography. All patients underwent surgery and surgical and histological staging were performed.
  
  
  RESULTS
  All the tumours were visualized by endoscopic ultrasonography, and 92% were correctly localized; 63% of the tumours were visualized by computed tomography. In lymph node involvement diagnosis (23 patients), endoscopic ultrasonography. In major portal vessel involvement diagnosis (14 patients), endoscopic ultrasonography sensitivity and specificity were respectively 71.4% and 95.65%, and 21.4% and 100% for computed tomography. In a vessel-by-vessel analysis, endoscopic ultrasonography was superior to computed tomography for veinous involvement diagnosis (sensitivity: 68.4% vs 26.3%), and the results were similar for arterial involvement diagnosis (sensitivity: 55.5% vs 66.6%).
  
  
  CONCLUSIONS
  Endoscopic ultrasonography is more accurate than computed tomography in detection of metastatic lymph nodes and portal involvement, and their results are similar in detection of arterial involvement.
authors.affiliation: Service de Gastroentérologie, Hôpital Broussais, Paris.
authors.forename: O
authors.initials: O
authors.lastname: Marty
authors.forename: J M
authors.initials: JM
authors.lastname: Aubertin
authors.forename: J L
authors.initials: JL
authors.lastname: Bouillot
authors.forename: A
authors.initials: A
authors.lastname: Hernigou
authors.forename: F
authors.initials: F
authors.lastname: Bloch
authors.forename: J P
authors.initials: JP
authors.lastname: Petite
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D000368:Aged; D000369:Aged, 80 and over; D014670:Ampulla of Vater / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D003138:Common Bile Duct Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D016145:Endoscopy, Digestive System / Q000379:methods*; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography
vernacular_title: Comparaison prospective de l'échoendoscopie et de la tomodensitométrie dans le bilan d'extension loco-régionale de tumeurs malignes ampullaires et pancréatiques vérifiées chirurgicalement.