Repercusión en el manejo quirúrgico de la ecografía de reevaluación para caracterización de lesiones detectadas en resonancia magnética / Effect on surgical management of second-look ultrasound to characterise lesions detected by magnetic resonance imaging

INTRODUCCIÓN: La ecografía de reevaluación, o de «second-look» (ESL), es útil para caracterizar lesiones de nueva aparición identificadas durante el estudio mediante resonancia magnética (RM). También puede ayudar a optimizar el tratamiento quirúrgico, ya que permite realizar biopsias y obtener un resultado anatomopatológico de las lesiones. El objetivo de este estudio es determinar la utilidad de la ESL para la identificación y la caracterización de lesiones detectadas incidentalmente por RM, así como la repercusión posterior en el manejo quirúrgico. MATERIAL Y MÉTODO: Se realizó un estudio observacional retrospectivo en el que se incluyen mujeres diagnosticadas de cáncer de mama a las que se les realiza ESL tras RM, entre 2013 y 2015. Se recogieron datos epidemiológicos, del tumor primario, características de las lesiones identificadas por RM y posteriormente por ESL, procedimientos quirúrgicos y resultados anatomopatológicos. RESULTADOS: Se identificaron 168 lesiones nuevas mediante RM en 110 pacientes. De ellas, 123 (73,2%) fueron objetivadas posteriormente en la ESL. De acuerdo con el sistema BI-RADS, 88 (71,6%) lesiones se caracterizaron como BI-RADS3 y 24 (19,5%) como BI-RADS4. El resultado de la biopsia tras ESL fue de malignidad en 17 lesiones, lo cual conlleva un cambio de actitud quirúrgica en 15 pacientes. CONCLUSIONES: La ESL puede ser útil para optimizar el tratamiento quirúrgico de las pacientes con cáncer de mama en las que se detecta una nueva lesión mediante RM, permitiendo caracterizar, localizar dicha lesión y realizar biopsias para obtener un resultado anatomopatológico que nos ayude a decidir si es necesaria su exéresis

INTRODUCTION: Second-look ultrasound (SLU) is useful to characterise new lesions identified by magnetic resonance imaging (MRI). SLU may also help to optimise surgical treatment since it allows the performance of biopsies and histopathological analysis of the lesions. The aim of this study was to determine the utility of SLU to identify and characterise lesions initially detected by MRI, as well as its subsequent influence on surgical management. MATERIAL AND METHOD: We performed an observational retrospective study that included women diagnosed with breast cancer who underwent SLU after MRI between 2013 and 2015. We collected data on epidemiological factors, the primary tumour, the characteristics of the lesions identified by MRI and subsequently by SLU, surgical procedures, and histopathological results. RESULTS: A total of 168 new lesions were identified by MRI in 110 patients. Of these, 123 (73.2%) were subsequently identified in SLU. Using the BI-RADS system, 88 (71.6%) lesions were classified as BI-RADS3 and 24 (19.5%) as BI-RADS4. The result of biopsy after SLU was malignancy in 17 lesions, leading to a change of surgical management in 15 patients. CONCLUSIONS: SLU can be useful to optimise the surgical treatment of patients with breast cancer and detection of a new lesion by MRI. SLU allows these lesions to be characterised and localised and biopsies to be taken. This in turn allows histopathological analysis, which helps to determine the need for extirpation of the lesion

MR Imaging Findings in Molecular Subtypes of Breast Cancer According to BIRADS System.

To evaluate magnetic resonance imaging (MRI) findings, according to Breast Imaging-Reporting and Data System (BI-RADS), and to relate them with molecular subtypes of breast cancer. The MRI findings were reviewed retrospectively in 201 women diagnosed of invasive breast cancer confirmed by surgery and were compared with the molecular subtypes. Following the BI-RADS, MRI findings included disease type, size, enhancement, morphology and contrast kinetics. In mass-like lesion types were studied shape, margin and enhancement, and in nonmass-like lesion types, distribution modifiers and internal enhancement. Chi-squared analysis showed significant association (p < 0.01) between molecular subtypes and lesion type on MRI and histologic grade. Shape, margin and mass enhancement (p < 0.05) also showed significant association among molecular subtypes. Triple negative were more frequently unifocal and mass-like lesion, high histologic grade, round shape, smooth margin, and rim enhancement. Luminal-A were more frequently low grade, mass-like lesion, irregular shape and spiculated or irregular margin. Luminal-B were more frequently moderate-low grade, mass-like lesion, nonirregular shape and spiculated margin. HER-2-enriched were more frequently moderate grade, nonmass-like lesion and multicentric lesions were more present than in other subtypes. There are significantly different MRI features, according to BI-RADS, between the molecular subtypes breast cancer.