Can enhancement types on preoperative MRI reflect prognostic factors and surgical outcomes in invasive breast cancer?

Objectives This study was conducted in order to evaluate whether enhancement types on preoperative MRI can reflect prognostic factors and surgical outcomes in invasive breast cancer. Methods Among 484 consecutive patients who underwent preoperative breast MRI from October 2014 to July 2017 for biopsy-proven breast cancer, 313 patients with 315 invasive breast cancers who underwent subsequent surgery were finally included in this study. Two radiologists retrospectively reviewed preoperative MRI findings of these 315 lesions and categorized them to mass, nonmass, and combined type according to enhancement features. Combined type was defined as coexisted mass and nonmass enhancement. Histopathologic results focusing on prognostic factors and surgical outcomes were compared among the three types of lesion using Pearson’s chi-square, linear-by-linear association, Kruskal–Wallis, one-way ANOVA test, and multinomial logistic regression. Results Of the cancers analyzed, 198 (62.9%) were mass, 59 (18.7%) were nonmass, and 58 (18.4%) were combined type. The nonmass type showed the smallest invasive tumor size ( p