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European Radiology
Published in: European Radiology 6/2018

01-06-2018 | Magnetic Resonance

To evaluate the feasibility of magnetic resonance imaging in predicting unusual site ectopic pregnancy: a retrospective cohort study

Authors: Gabriele Masselli, Martina Derme, Maria Grazia Piccioni, Vincenzo Spina, Francesca Laghi, Gianfranco Gualdi, Marialuisa Framarino-dei-Malatesta

Published in: European Radiology | Issue 6/2018

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Abstract

Objective

To evaluate the accuracy of pelvic MRI in the diagnosis of unusual ectopic pregnancy (EP), when ultrasound (US) examination is inconclusive.

Methods

We retrospectively reviewed the medical records of 150 patients with suspected EP. Clinical, US and MRI features of 15 unusual EPs were analysed. Two radiologists independently reviewed each case resolving by consensus any diagnostic discrepancy. Interobserver agreement was assessed using the Cohen κ test.

Results

MRI displayed a gestational sac-like structure surrounded by a thick wall in all cases. The thick wall displayed hyperintensity in 41 %, isointensity in 35 % and hypointensity in 24 % of cases on T1-weighted images. Diffusion- and fat saturation T1-weighted images were the most accurate sequences, as they enabled identification of 15/15 and 14/15 patients, respectively. Although US was false negative in detecting cervical and uterine infiltration underlying the caesarean scar, MRI was able to identify the invasion. Interobserver agreement was very good for all sequences (κ=0.892–1.0).

Conclusions

MRI plays an important role in the early diagnosis of unusual EP. It should be considered after negative US findings, providing accurate evaluation of the site and the possible infiltration of these lesions, which help in the management of these patients.

Key Points

• MRI is being increasingly used as a problem-solving modality in ectopic pregnancy.
• MRI plays an important role in early diagnosis of unusual ectopic pregnancy.
• Knowledge of MRI features in EP is essential to determinate appropriate management.
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Metadata
Title
To evaluate the feasibility of magnetic resonance imaging in predicting unusual site ectopic pregnancy: a retrospective cohort study
Authors
Gabriele Masselli
Martina Derme
Maria Grazia Piccioni
Vincenzo Spina
Francesca Laghi
Gianfranco Gualdi
Marialuisa Framarino-dei-Malatesta
Publication date
01-06-2018
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 6/2018
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-017-5237-6

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