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On-line version ISSN 1678-7099
CALAS, Maria Julia Gregorio; KOCH, Hilton Augusto and DUTRA, Maria Virginia Peixoto. Breast ultrasound: evaluation of echographic criteria for differentiation of breast lesions. Radiol Bras [online]. 2007, vol.40, n.1, pp. 1-7. ISSN 1678-7099. http://dx.doi.org/10.1590/S0100-39842007000100003.
OBJECTIVE: Breast cancer is one of the most important causes of death in women. The association of different diagnostic methods has been successfully employed as a means to enhance early diagnosis. In this scenario, the interventional and diagnostic breast ultrasound has played a significant role. This study has two main objectives: to identify echographic criteria related to benignancy and malignancy and to analyze echographic characteristics, evaluating their role as malignancy predictors. MATERIALS AND METHODS: Echographic morphological criteria adopted in the images description were: shape, limits, contour, echogenicity, echotexture, echotransmission, lesion orientation, and secondary signs. Validation was sought on 450 echographic images compared with follow-up and histopathological results. RESULTS: Main benignancy criteria were: well defined shape, regular contour, precise limits, lesions isoechoic to fatty tissue, homogeneous echotexture, and horizontal orientation. The criteria more typically related to malignancy were: ill-defined shape, irregular contour, partially precise limits, and hypoechogenicity. Contour irregularity has presented the greatest sensitivity (92.7%) as well as the highest negative predictive value (98.2%), while vertical orientation of the lesion has presented the greatest specificity (99.3%), and ill-defined shape, the highest positive predictive value (91.0%). CONCLUSION: The standardization of the method for characterization and description of breast ultrasound images has resulted in reports uniformization and optimization, allowing more appropriate therapeutic decisions.
Keywords : Ultrasound; Breast lesions; Diagnosis.