Anatomical variations of cystic duct insertion and their relationship with choledocholithiasis: an MRCP study

GÜNDÜZ N., Dogan M. B. , Alacagoz M., Yagbasan M., Soylemez U. P. O. , ATALAY B.

EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE, vol.52, no.1, 2021 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 1
  • Publication Date: 2021
  • Doi Number: 10.1186/s43055-021-00579-x
  • Journal Name: EGYPTIAN JOURNAL OF RADIOLOGY AND NUCLEAR MEDICINE
  • Journal Indexes: Emerging Sources Citation Index, Scopus, EMBASE, Directory of Open Access Journals
  • Keywords: MRCP, Anatomical variation, Choledocholithiasis, Cystic duct insertion, MAGNETIC-RESONANCE CHOLANGIOPANCREATOGRAPHY, BILIARY TREE, ENDOSCOPIC-RETROGRADE, POPULATION, VARIANTS, TRACT

Abstract

Background: The frequency of insertion variations of cystic duct (CD) is inconsistent between studies caused to some extent by the way they give the relative frequency of the variations. Moreover, certain insertion variations have been reported to be associated with choledocholithiasis. This study aimed to assess the frequency of CD insertion variations with a comprehensive way of classification in an unselected population in whom MRCP was performed. Moreover, the relationship between the types of variant insertions and choledocholithiasis using MRCP was also assessed. Patients undergoing magnetic resonance cholangiopancreatography (MRCP) were reviewed retrospectively by two radiologists who were blinded to the clinical data. The normal insertion was defined as the union through middle one third of the lateral border of the extrahepatic bile duct. The transverse site (lateral, medial, anterior, and posterior) and the craniocaudal level (high, mid and low) of insertions and their intersections were assessed using axial and coronal slices, respectively. In addition, the frequencies of the CD insertion variations were compared between choledocholithiasis and control (no-choledocholithiasis) groups.