Table 1 Basic characteristics of included studies.
Author | Year | Country | Centers | Study type | Study period | Age (*:mean; #:median) | Sex (female %) | Number of patients | Classification | Outcomes |
|---|---|---|---|---|---|---|---|---|---|---|
Balan et al.15 | 2020 | Romania | 1 | Prospective cohort | January 2018 to August 2018 | NA | NA | 322 | Regular: 52% Canard type I 11%: Canard type II: 19% Canard type III: 10% Canard type IV: 8% | Difficult cannulation Cannulation time Cannulation attempts Post-ERCP pancreatitis Post-ERCP bleeding Post-ERCP infection |
Canena et al.16 | 2021 | Portugal | 3 | Prospective cohort | May 2018 to October 2020 | *69.6 | 56.8% | 361 | Viana type I: 13% Viana type IIa: 35% Viana type IIb: 30% Viana type IIc:10% Viana type IIIa: 4% Viana type IIIb: 4% Viana type IV: 4% | Cannulation failure Cannulation time Post-ERCP pancreatitis Post-ERCP bleeding Post-ERCP perforation |
Chen et al.5 | 2020 | Taiwan | 1 | Prospective cohort | October 2017 to October 2018 | *64 (SD: 16.5) | 47.5% | 286 | Haraldsson type I: 41% Haraldsson type II: 9% Haraldsson type III: 22% Haraldsson type IV: 28% | Cannulation failure Cannulation time Post-ERCP pancreatitis Post-ERCP bleeding Post-ERCP perforation Post-ERCP cholangitis |
Fernandes et al.18 | 2018 | Portugal | 3 | Prospective cohort | August 2017 to January 2018 | #79 | 59.4% | 106 | Leés type I: 50% Leés type II: 32% Leés type III: 12% Leés type IV: 6% | Cannulation time |
Gutierrez- De Aranguren et al.19 | 2021 | Peru | 1 | Retrospective cross-sectional | July 2019 to April 2021 | *55 (SD:2 0) | 66.5% | 188 | Haraldsson type I: 32% Haraldsson type II: 25% Haraldsson type III: 27% Haraldsson type IV: 16% | Difficult cannulation |
Haraldsson et al.4 | 2019 | Nordic countries | 9 | Prospective cohort | NA | 66 (SD: 16) | 52% | 1377 | Haraldsson type I: 56% Haraldsson type II: 13% Haraldsson type III: 23% Haraldsson type IV: 8% | Difficult cannulation Cannulation time Post-ERCP pancreatitis |
Liu et al.20 | 2021 | China | 1 | Retrospective cohort | January 2008 to December 2017 | NA | NA | 11 090 | Normal: 44% Thick and long: 11%: Peridiverticular: 27% Intradiverticular: 5% Ectopic: 1% Edematous 10%: Ulcerative: 2% | Difficult cannulation |
Mohamed et al.6 | 2021 | Canada | 1 | Retrospective cohort | September 2018 to January 2020 | NA | 51.8% | 637 | Haraldsson type I: 62% Haraldsson type II: 5% Haraldsson type IIIa: 9% Haraldsson type IIIb: 9% Haraldsson type IV: 3% Type D: 12% | Cannulation failure Cannulation time Cannulation attempts Post-ERCP pancreatitis Post-ERCP bleeding Post-ERCP infection Post-ERCP cholangitis or sepsis |
Nakeeb et al.17 | 2016 | Egypt | 1 | Prospective cohort | August 2012 to September 2014 | *58.4 (SD: 14.7) | 44.4% | 996 | Normal: 60% Atrophic: 3% Pregnant: 7% Tumor: 7% Redundant: 8% Juxtadivertcular: 8% Small: 6% Long: 1% | Post-ERCP pancreattis |
Onilla et al.21 | 2021 | Philippines | 1 | Retrospective cohort | January 2017 to December 2019 | NA | NA | 347 | Regular protrusion: 57% Small protrusion: 31% Large protrusion: 12% Annular pattern: 72% Unstructured pattern: 11% Longitudinal pattern 11%: Isolated pattern: 1% Gyrus pattern: 5% | Difficult cannulation Cannulation failure |
Quiroga-Purizaca et al.22 | 2022 | Peru | 1 | Propective cohort | NA | *51.5 ( CI 48.8–54.1) | 68.4% | 138 | Haraldsson type I: 59% Haraldsson type II: 8% Haraldsson type III: 29% Haraldsson type IV: 4% | Difficult cannulation Cannulation time Cannulation attempts Post-ERCP pancreatitis Post-ERCP bleeding Post-ERCP perforation |
Sadeghi et al.23 | 2019 | Iran | 1 | Prospective cohort | September 2017 to March 2018 | *62.3 (SD: 15.5) | 51.4% | 72 | Small: 33%: Bulging: 28% Long: 39% | Cannulation success |
Saito et al.24 | 2022 | Japan | 3 | Retrospective case–control | April 2012 to February 2020 | *74.9 | 47.5% | 1406 | Haraldsson type I: 45% Haraldsson type II: 44% Haraldsson type III: 7% Haraldsson type IV: 4% | Difficult cannulation |
Thongsuwan et al.25 | 2021 | Thailand | 1 | Retrospective cohort | January 2013 to May 2017 | NA | 50.4% | 558 | Haraldsson type I: 66% Haraldsson type II: 16% Haraldsson type III: 12% Haraldsson type IV: 6% | Difficult cannulation Cannulation failure Post-ERCP pancreatitis, Post-ERCP bleeding Post-ERCP infection |
Watanabe et al.26 | 2019 | Japan | 1 | Retrospective cohort | September 2013 to June 2017 | #70 | 36% | 589 | Regular protrusion: 12% Small protrusion: 78% Large protrusion: 10% Annular pattern: 67% Unstructured pattern: 7% Longitudinal pattern: 7% Isolated pattern: 1% Gyrus pattern:16% Unclassified pattern: 2% | Difficult cannulation Cannulation failure Cannulation attempts |
Zhang et al.27 | 2016 | China | 1 | Retrospective cohort | February 2012 to March 2015 | *75 (SD: 2.2) | 42.7% | 82 | bulging: 44% normal: 22% small: 16% unusual location: 18% | Cannulation failure Cannulation time |
Zheng et al.28 | 2020 | China | 1 | Retrospective cohort | January 2016 to December 2019 | NA | 46.1% | 2385 | others:18% villous: 74% granular: 8% | Post-ERCP pancreatitis |
