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Misleading findings of liver-specific MR contrast agent for radiological diagnosis of cysto-biliary communication in hydatid cysts

  • Fatma KulaliEmail author
  • Aylin Acar
  • Aslihan Semiz-Oysu
  • Tolga Canbak
  • Kerem Tolan
  • Yasar Bukte
ABDOMINAL RADIOLOGY
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Abstract

Objective

To investigate the effectiveness of gadoxetic acid-enhanced magnetic resonance cholangiopancreatography (CE-MRCP) and T2-weighted half-Fourier acquisition single-shot turbo spin-echo (T2W HASTE) sequences for diagnosis of cysto-biliary communication in hydatid cysts compared to surgical results.

Methods

Preoperative abdominal magnetic resonance imaging examinations of patients who underwent surgery for hepatic hydatid cysts were reviewed by two radiologists retrospectively. A total of 45 patients with hydatid cysts were included. Of 45, 27 also had CE-MRCPs. T2W HASTE sequences and CE-MRCPs were investigated separately for cysto-biliary communication. The relationship between radiological and surgical results was analyzed. The interobserver agreement was evaluated.

Results

Of 45 hydatid cysts, there were surgically proven 21 cysts without biliary communications and 24 cysts with biliary communications. All cysts with biliary communications were shown on T2W HASTE sequences. There was no leakage of gadoxetic acid into these cysts (n = 24). Sensitivity, specificity, negative predictive value, positive predictive value (PPV), and accuracy of diagnosis of cyst with biliary communication on T2W HASTE sequences was 100%, 63.64%, 100%, 66.67%, and 78.95%, respectively. Specificity (77.78%), PPV (87.50%), and accuracy (91.30%) were increased in ≥ 10 cm cysts. There was almost perfect interobserver agreement (K = 0.81–1.00).

Conclusion

Leakage of gadoxetic acid inside the cyst indicates biliary communication. However, the lack of leakage does not rule out cysto-biliary communication. When biliary communication is clearly shown on T2W HASTE sequences, it should be reported as cysto-biliary communication even if there is no leakage of gadoxetic acid into the cyst on CE-MRCP.

Keywords

Biliary system Gadoxetic acid Hydatid cyst Magnetic resonance cholangiopancreatography 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

Informed consent

For this type of study formal consent is not required.

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Copyright information

© Italian Society of Medical Radiology 2019

Authors and Affiliations

  • Fatma Kulali
    • 1
    Email author
  • Aylin Acar
    • 2
  • Aslihan Semiz-Oysu
    • 1
  • Tolga Canbak
    • 2
  • Kerem Tolan
    • 2
  • Yasar Bukte
    • 1
  1. 1.Radiology DepartmentUniversity of Health Sciences Umraniye Training and Research HospitalIstanbulTurkey
  2. 2.General Surgery DepartmentUniversity of Health Sciences Umraniye Training and Research HospitalIstanbulTurkey

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