E-ISSN 1305-3612
Abdominal Radiology - Original Article
Accuracy of the ADNEX MR scoring system based on a simplified MRI protocol for the assessment of adnexal masses
1 Department of Obstetrics and Gynecology, State University of Campinas- Unicamp, Campinas Faculty of Medical Sciences, São Paulo, Brazil.; Section of Imaginology, Sumaré State Hospital, Sumaré, São Paulo,, Brazil  
2 Department of Obstetrics and Gynecology, State University of Campinas-Unicamp, Campinas Faculty of Medical Sciences, São Paulo, Brazil  
3 Section of Imaginology, Sumaré State Hospital, Sumaré, São Paulo, Brazil  
4 Department of Radiology, Federal University of Rio de Janeiro National Faculty of Medicine, Rio de Janeiro, RJ, Brazil  
Diagn Interv Radiol 2018; 24: 63-71
DOI: 10.5152/dir.2018.17378
Abstract

PURPOSE: We aimed to evaluate the ADNEX MR scoring system for the prediction of adnexal mass malignancy, using a simplified magnetic resonance imaging (MRI) protocol.

 

METHODS: In this prospective study, 200 patients with 237 adnexal masses underwent MRI between February 2014 and February 2016 and were followed until February 2017. Two radiologists calculated ADNEX MR scores using an MRI protocol with a simplified dynamic study, not a high temporal resolution study, as originally proposed. Sensitivity, specificity, positive and negative predictive values, likelihood ratios, and the area under the receiver operating characteristic curve were calculated (cutoff for malignancy, score ≥ 4). The reference standard was histopathologic diagnosis or imaging findings during >12 months of follow-up.

 

RESULTS: Of 237 lesions, 79 (33.3%) were malignant. The ADNEX MR scoring system, using a simplified MRI protocol, showed 94.9% (95% confidence interval [CI], 87.5%–98.6%) sensitivity and 97.5% (95% CI, 93.6%–99.3%) specificity in malignancy prediction; it was thus highly accurate, like the original system. The level of interobserver agreement on simplified scoring was high (κ = 0.91).

 

CONCLUSION: In a tertiary cancer center, the ADNEX MR scoring system, even based on a simplified MRI protocol, performed well in the prediction of malignant adnexal masses. This scoring system may enable the standardization of MRI reporting on adnexal masses, thereby improving communication between radiologists and gynecologists. 

 

 

You may cite this article as: Pereira PN, Sarian LO, Yoshida A, et al. Accuracy of the ADNEX MR scoring system based on a simplified MRI protocol for the assessment of adnexal masses. Diagn Interv Radiol 2018; 24:63–71.

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