Lobular carcinoma in situ: current concepts and controversies.

Clinical and clinicopathologic studies performed over the last 50 years have elucidated many of the important features of lobular carcinoma in situ. However, certain aspects of the natural history, treatment, and diagnosis of these lesions remain controversial. The purpose of this article is to review the current understanding of lobular carcinoma in situ and to highlight some of the controversies surrounding this entity.