Abstract
OBJECTIVES:In breast cancer diagnosis, mammography (MMG), ultrasonography (USG) and magnetic resonance imaging (MRI) are the imaging methods most used. There is a scarcity of comparative studies that evaluate the accuracy of these methods in the diagnosis of breast cancer.METHODS:A cross-sectional study was carried out through the review of electronic medical records of 32 female patients who underwent breast imaging examinations at a imaging diagnostic center in Teresina, State of Piauí, Brazil. Patients who had these three imaging methods at the time of the evaluation of the same nodule were included. The nodule must have been classified as suspect by the BI-RADS® system in at least one of the methods. Data from each method were compared with the histopathological examination. Statistical analysis used the calculation of proportions in Excel 2010.RESULTS:MMG showed 56.2%, 87.5%, 81.8%, 66.7% and 71.8% of sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy, respectively. USG had 75%, 18.8%, 48%, 42.8% and 46.9% of sensitivity, specificity, PPV, NPV and accuracy, respectively. In turn, MRI had 100%, 50%, 66.7%, 100% and 75% of sensitivity, specificity, PPV, NPV and accuracy, respectively.CONCLUSION:Thus, MRI and MMG were more accurate in evaluating suspicious breast lumps. MRI had a low specificity, mainly to high breast density, while MMG had also sensitivity limited due to high breast density and USG has been proven to be useful in these patients.
Highlights
Breast cancer is the most common cancer among the female population worldwide, with an incidence of 2,088,849 new cases in 2018 and mortality of 626,679 in this year [1]
The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of MMG were 56.2%, 87.5%, 81.8%, 66.7%, and 78.1%, respectively, and an area under the receiver operating characteristic (ROC) curve of 0.728, all within the confidence interval (Table 2)
Sensitivity 56.2%; Specificity 87.5%; NPV 66.7%; PPV 81.8%; Accuracy 71.8%; Area under the receiver operating characteristic curve 0.712
Summary
Breast cancer is the most common cancer among the female population worldwide, with an incidence of 2,088,849 new cases in 2018 and mortality of 626,679 in this year [1]. In Brazil, breast cancer is the most common malignant cancer in women after non-melanoma skin cancer, with approximately 59,700 new cases in 2019 and 15,403 deaths registered in 2015 [2]. The success of breast cancer treatment depends on the early diagnosis administering treatment during the initial. Received for publication on February 19, 2020. Accepted for publication on May 29, 2020
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