Recurrence in lobular carcinoma of the breast: A 14-year review

Introduction: The two most common types of breast cancer are invasive or infiltrating ductal carcinoma (IDC) and invasive or infiltrating lobular carcinoma (ILC) (Pestalozzi et al., J. Clin. Oncol., 26, 2008, 3006). Between 5% and 15% of invasive breast carcinomas are lobular carcinomas (Pestalozzi et al., J. Clin. Oncol., 26, 2008, 3006; Dossus and Benusiglio, Breast Cancer Res., 17, 2015, 37; Braunstein et al., Breast Cancer Res. Treat., 149, 2015, 555). The paucity of data relating to recurrence rates of lobular cancers prompted this study. Methods: A retrospective cohort study of all cases of lobular breast carcinoma reported to the Western Australia Cancer Registry with the clinical and pathological details between 2000 and 2014. Results: Overall, 2463 subjects with a total of 2526 events of invasive lobular carcinoma of the breast. 11/2463 (0.45%) subjects met criteria for local recurrence of invasive lobular breast cancer, with an incidence of 1 in 224. Conclusion: There are clinical implications for the management and follow-up for patients with a diagnosis of lobular cancer of the breast. Due to the low recurrence rate, now, the standard practice in our institution does not offer magnetic resonance imaging (MRI) as part of the follow-up for ILC patients. Other centres should establish local recurrence rates to aid development of appropriate management protocols.