title: Diagnosis of Malignant Biliary Strictures: Conventional or Negative Pressure Brush Cytology?
abstract: Background/Objective: The aim of this study was to perform a comparative evaluation of the yields of conventional
  brush cytology and brush cytology with negative pressure in the diagnosis of malignant biliary strictures. Methods: A
  total of 132 consecutive patients undergoing endoscopic were identified. Of these, 88.0 had brush cytology after ERCP
  and 44 were Brush cytology with negative pressure. Retrograde cholangiopancreatography (ERCP) including brush
  cytology and brush cytology with negative pressure in patients with biliary strictures between 2012-2015. Endoscopic
  retrograde cholangiography was performed with a standard videoduodenoscope Olympus TFJ 160-R (Olympus,
  Hamburg, Germany) and brush cytology with a Cook medical Double Lumen Biliary BrushTM (Cytology). Means
  and standard frequencies were used to calculate variables. Results: Positive results for malignancy were obtained in
  22 of 88 patients (25%) by brush cytology and 31 of 44 patients (70.4 %) by brush cytology with negative pressure.
  Conclusions: Sensitivity of cytology sampling could be maximized by negative pressure during ERCP.
authors.affiliation: Shahid Behesti University of Medical Sciences, Taleghani Hospital, Parvaneh Ave, Tabnak Str, Evin ,Tehran, Iran. Email: ahmaliver@yahoo.com
authors.forename: Mohammad Reza
authors.initials: MR
authors.lastname: Abbasi
authors.forename: Seyedeh Masoumeh
authors.initials: SM
authors.lastname: Ghazi Mirsaeed
authors.forename: Amir Houshang
authors.initials: AH
authors.lastname: Mohammad Alizadeh
keywords: Cytology; ERCP; EUS; FNA