Updates on Lobular Neoplasms and Papillary, Adenomyoepithelial, and Fibroepithelial Lesions of the Breast

Context.--This review article is a result of the breast pathology lectures given at the Sixth Chinese American Pathologists Association annual diagnostic pathology course in October 2020 (held virtually due to cOvID-19). Objective.--To update recent developments, in this review article, the authors wrote minireviews in the following 4 areas: lobular neoplasm, adenomyoepithelial lesions, papillary lesions, and fibroepithelial lesions. Data Sources.--The sources include extensive literature review, personal research, and experience. Conclusions.--With the wide practice of screening mammography, these lesions are not uncommon in image-guided core biopsies and excisional specimens. Many recent developments have emerged in understanding these lesions. We aim to provide readers with concise updates for each of these lesions with a focus on recent updates in definitions, diagnostic criteria, management, and molecular profiles that are most relevant to the daily practice of pathology and patient management. (Arch Pathol Lab Med. 2022;146:930-939; doi: 10.5858/arpa.2021-0091-RA)