title: Percutaneous transluminal forceps biopsy in patients suspected of having malignant biliary obstruction: factors influencing the outcomes of 271 patients.
abstract: OBJECTIVE
  To evaluate predictive factors for false-negative diagnosis of percutaneous forceps biopsies in patients suspected of having a malignant biliary obstruction METHODS: Two hundred seventy one consecutive patients with obstructive jaundice underwent percutaneous forceps biopsy. In each patient, three to five specimens (mean, 3.5 specimens) were collected from the lesion. The final diagnosis for each patient was confirmed with pathologic findings at surgery, additional histocytologic data, or clinical and radiologic follow-up. Univariate and multivariate logistic regression analysis was used to identify risk factors associated with false-negative diagnosis.
  
  
  RESULTS
  One hundred ninety four of 271 biopsies resulted in correct diagnoses of malignancy, while 20 biopsy diagnoses were proved to be true-negative. There were 57 false-negative diagnoses and no false-positive diagnoses. The diagnostic performance of transluminal forceps biopsy in malignant biliary obstructions was as follows: sensitivity, 77.2%; specificity, 100%; and accuracy, 78.9%; positive predictive value, 100%, negative predictive value; 25.9%. Periampullary segment of common bile duct, intrahepatic bile duct and metastatic disease were the significant risk factors of false-negative diagnosis.
  
  
  CONCLUSIONS
  Percutaneous forceps biopsy provides relatively high accuracy in the diagnosis of malignant biliary obstructions. The predictive factors of false-negative biopsy were determined to be biopsy site and origin of primary tumour.
  
  
  CONCLUSIONS
  • Percutaneous forceps biopsy provides relatively high accuracy in diagnosis of malignant biliary obstructions. • The predictive factors of false-negative biopsy were biopsy site and origin of primary tumour. • The procedure-related complications were low.
authors.affiliation: Department of Radiology, Kosin University College of Medicine, 262, Gamcheon-ro, Seo-gu, Busan, Korea.
authors.forename: Jung Gu
authors.initials: JG
authors.lastname: Park
authors.affiliation: Department of Radiology, Kosin University College of Medicine, 262, Gamcheon-ro, Seo-gu, Busan, Korea. gsjung240@gmail.com.
authors.forename: Gyoo-Sik
authors.initials: GS
authors.lastname: Jung
authors.affiliation: Department of Radiology, Kosin University College of Medicine, 262, Gamcheon-ro, Seo-gu, Busan, Korea.
authors.forename: Jong Hyouk
authors.initials: JH
authors.lastname: Yun
authors.affiliation: Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
authors.forename: Byung Chul
authors.initials: BC
authors.lastname: Yun
authors.affiliation: Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
authors.forename: Sang Uk
authors.initials: SU
authors.lastname: Lee
authors.affiliation: Department of Internal Medicine, Kosin University College of Medicine, Busan, Korea.
authors.forename: Byung Hoon
authors.initials: BH
authors.lastname: Han
authors.affiliation: Department of Radiology, Busan Medical Center, Busan, Korea.
authors.forename: Ji Ho
authors.initials: JH
authors.lastname: Ko
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001650:Bile Duct Neoplasms / Q000150:complications / Q000175:diagnosis*; D001653:Bile Ducts, Intrahepatic / Q000473:pathology; D001706:Biopsy / Q000379:methods*; D018281:Cholangiocarcinoma / Q000150:complications / Q000175:diagnosis*; D002780:Cholestasis, Intrahepatic / Q000175:diagnosis*; D003135:Common Bile Duct / Q000473:pathology; D005188:False Negative Reactions; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012307:Risk Factors; D012680:Sensitivity and Specificity; D013525:Surgical Instruments
keywords: Bile duct diseases; Biopsy; Cholangiocarcinoma; Diagnostic technique, surgical; Radiography, interventional