The purpose of this study was to determine the frequency, concordance and discordance of breast lesions during automated core biopsy . A USguided 14 -gauge automated core needle biopsy was performed on 188 lesions. Only in 1 of 120 bening diagnosed cases imaging-histologic discordance was present. This lesion underwent surgical excision and the case was diagnosed as having carcinoma in situ, as a definitive histological diagnosis. Assessment of correlation between imaging studies and histologic findings, as well as determination of concordance, are required to minimize diagnostic errors.Resumen: El propósito de nuestro estudio fue determinar la frecuencia, concordancias y discordancias de las lesiones mamarias. Se realizaron 188 biopsias core con aguja de 14G. Sólo 1 de las 120 lesiones benignas diagnosticadas fue discordante; se recomendó escisión quirúrgica cuyo resultado definitivo demostró carcinoma in situ. Para minimizar errores diagnósticos, se requiere evaluar la correlación entre las imágenes y el resultado histológico, además de establecer la concordancia.
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