The radiolucent periapical jaw lesions of 34 patients, which were surgically enucleated, were investigated by two radiologists using MRI, based on the same six criteria, to categorize the lesions as granulomas or radicular cysts. After apicoectomies, two oral pathologists (blinded to the radiologist's diagnoses) analyzed all specimens by referring to seven specific parameters and diagnosed the specimens as granulomas or radicular cysts. The inter-rater agreements between the radiologists and pathologists in terms of MRI and histological diagnoses, respectively, along with the discriminant power of the adopted criteria and the accuracy of the MRI assessments compared with the histopathologic results, were calculated. A strong inter-rater reliability was observed between the two radiologists (k-statistic = 0.86, p = 0.0001) and the two pathologists (k-statistic = 0.88, p = 0.0001). Reliability was higher for the radiological (Guttmann's lambda lower bound \> 0.6) than histopathological criteria. The accuracy (true positives plus true negatives) of the radiologists was higher than that of the pathologists based on receiver operator characteristic analysis (area under the curve = 0.87 and 0.91, respectively). MRI reliability and accuracy were high and comparable to histopathological reliability, highlighting the usefulness of this non-invasive exam as a pre-treatment diagnostic method for periapical endodontic lesions.
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The diagnostic accuracy of the resonance magnetic imaging, calculated in comparison with the pathologists' diagnosis with a ROC analysis
Timeframe: 5 years